Transcript General Statistics Office of Vietnam 2009 POPULATION AND HOUSING CENSUS IN VIETNAM Phnompenh, Cambodia, 14-17 November 2011

General Statistics Office of Vietnam
2009 POPULATION AND
HOUSING
CENSUS IN VIETNAM
Phnompenh, Cambodia, 14-17 November 2011
1. Brief introduction
of census taking in
Vietnam
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Population Census History in Vietnam
Census in Vietnam
- Census taking dating back many centuries.
- The first real census of an independent Vietnam was
conducted late in 1979.
- Internationally recognized census concepts, design
features and processing, was conducted in April 1989.
- The third census was conducted in April 1999.
- The last population and housing census has been
conducted in 2009 with a reference time of the census is
00.00 hours, 1 April 2009.
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The Census Preparation and Legal Authority
2009 Census
- The 2009 Census was conducted under the Prime
Minister’s Decision No. 94/2008/QD-TTg on 10/7/2008.
- Its main objective was to collect the basic data on
population and housing of Vietnam to provide services for
researching and analyzing.
- A survey of 15 percent of the national population has been
included to expand the census coverage, reduce the cost.
- Intelligent Character Recognition (ICR) has been adopted
for data capture instead of manual data entry via keyboard.
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Contents of the Census Questionnaire
2009 Census
- Face-to-face interview.
- Two questionnaires were used: a completed (short)
questionnaire and a sample (long) questionnaire.
+ Contents of the completed questionnaire:
++ Information on population
++ Dwellings of households
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Contents of the Census Questionnaire
(contd)
2009 Census
+ Contents of the sample questionnaire:
++ Information on population
++ Birth history of women aged 15-49 years
++ Information on deaths
++ Dwellings of households
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Pre-test and Pilot Census
2009 Census
Questionnaires and materials formally used in the census
have undergone three pre-tests and one pilot before being
applied in the actual census.
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Mapping and household listing
2009 Census
- Sketch maps and household listings is a basis for:
+ Distributing census resources.
+ Guiding enumerators to households.
+ Locating materials, questionnaires and stationery.
- Whole country is divided into about 172,000 EAs.
- Two types of maps: base maps and EA maps.
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Census Publicity
2009 Census
- Set up a plan for the publicity campaign of the census.
- It was launched in March 2009, reaching its crescendo
during 15 March to 20 April 2009.
- It was broadcasted on radio and TV, in daily newspapers
both centrally and locally and even on the radio systems
of the village and urban-blocks.
- Telephone hot-lines were installed in both central areas
and localities.
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Recruitment and Training
of the Census Officials
2009 Census
- Enumerators were assigned according to specific
geographical conditions and EA size.
- Team leaders were appointed to directly manage
enumerators’ work.
- There were supervisors at the central, provincial and
district levels
- All census participants have been trained very carefully.
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Data Processing and Tabulation
2009 Census
- Used ICR technology to input information directly from
questionnaires to computers instead of using keyboards.
- Success of ICR technology will be the premise for its
application in other statistics surveys.
- The GSO in co-operation with computer Company have
build
software,
organized
training
courses,
tested
systems, and finalized the software package for new TIS
and e-Form software.
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The Census Data Dissemination
2009 Census
- Preliminary results were released in early August 2009.
- Expanded sample results were published in December
2009.
- Completed results were disseminated in June 2010.
- Some in-depth monographs will be printed in late 2010.
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2. Overview of
evaluation of census
data
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Post enumeration
survey
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THE POST ENUMERATION SURVEY (PES) IN VIET NAM 2009
* Census time: 0h, April 01, 2009 .
Duration of the main fieldwork: from 1 –15 April
* PES time: 0h, April 01, 2009.
Duration of the PES fieldwork : from 5 – 30 May,
2009
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THE POST ENUMERATION SURVEY (PES) IN VIET NAM 2009


After finishing enumeration, post enumeration survey (PES) were
conducted to define the completeness and accuracy of the census
data. A set of 60 EA’s were randomly selected for re-interview
which was directly organized and conducted by the Office of the
Central Population and Housing Census Steering Committee.
The Office of the Central Population and Housing Census Steering
Committee established 6 PES teams, one PES team for one
region. Each PES team contains 5 persons:
 The team leader was selected from the department of
population and labor statistics
 3 interviewers were selected from Provincial census office
and 1 driver from General Statistics Office, included .
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THE POST ENUMERATION SURVEY (PES) IN VIET NAM 2009


In the PES, to define the completeness of the census, each
usual household member was asked 4 questions: (1) full
name; (2) Relationship with the head of household; (3) sex ;
(4) month and year of birth or age. The responses of the PES
have been compared with the census questionnaires to find
data missing in the census enumeration or in the PES.
We consider that the PES result is the completeness result,
hence: the PES result shows both the under- count rate and
over – count rate.
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THE POST ENUMERATION SURVEY (PES) IN VIET NAM 2009
We collected 4 measures:
* N1 -The total number of persons were recorded in census
form.
* N2 -The total number of persons were recorded in PES form
(It is a very exact record).
* n1 – The number of persons were recorded in census form
only, not recorded in PES forms. That is the number of
persons of over count
* n2 – The number of persons were recorded in PES form
only, not recorded in census forms. That is the number of
persons of under count .
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THE POST ENUMERATION SURVEY (PES) IN VIET NAM 2009
The PES result of 2009 census in Viet Nam shows that the error rate is 0.3%
(under count rate minus over count rate), Equivalent to about 258,000 people )
Regions
Whole country
1.Northern Midlands and Mountain Areas
2. Red River Delta
3.North Central Area and Central Coastal Area
4.Central Highlands
5.South East
6. MeKong River Delta
Over Under count
count
rate (%)
rate (%)
1.8
2.7
2.8
1.1
1.5
0.7
1.8
1.5
2.0
2.1
0.9
2.0
0.8
1.6
Net error
(undercount
rate – over
count rate)
-0.3
-0.7
-0.7
-0.2
0.5
0.1
-0.2
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Demographic
methods used in 2009
census
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Some main indicators: Completed Result
Population size
Mi l l i on s
100
10
52,742
20
34,929
30
30,172
40
41,063
50
49,16
60
'76
'79
64,376
70
76,323
80
85,847
90
0
'60
'65
'70
'89
'99
'09
Ye ar
Total population of Vietnam at 0:00 on 01
April, 2009 was 85.846.997 persons
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Some main indicators: Completed Result
Pyramid
1979
1999
80+
75-79
70-74
65-69
60-64
55-59
1989
80+
75-79
70-74
65-69
60-64
55-59
50-54
45-49
40-44
50-54
45-49
40-44
35-39
30-34
35-39
30-34
25-29
20-24
15-19
25-29
20-24
15-19
10-14
5-9
0-4
10-14
5-9
0-4
80+
75-79
70-74
80+
75-79
70-74
2009
65-69
60-64
55-59
65-69
60-64
55-59
50-54
45-49
40-44
50-54
45-49
40-44
35-39
30-34
35-39
30-34
25-29
20-24
15-19
25-29
20-24
15-19
10-14
5-9
0-4
10-14
5-9
0-4
From 1979 – 2009, Vietnam population is transfering from
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young
structure
intoonold
structure.
Population
structure
Some main indicators: Completed Result
Pe rce ntage
80
1999
2009
69,1
70
61,1
60
50
40
30
33,1
24,5
20
5,8
10
6,4
0
< 15 ages
15-64 ages
> 65 ages
Age group
According to the Population Model of the United
Nations, Vietnam is in a period of “Population
Bonus”
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Population structure
Percentage
100
Dependent Ratio
Aging Index
80
60
40
20
0
1979
1989
1999
2009
Year
Aging Index has increased;
Dependent Ratio has continuously declined.
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Fertility and Mortality Trend
CBR
(%o)
TFR
(children per
woman)
CDR
(%o)
IMR
(%o)
1999
19.9
2.3
5.6
36.7
2009
17.6
2.0
6.8
16
Vietnam’s fertility is under the
Replacement Fertility Level
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Method to estimate fertility and
mortality
-TFR
is usually estimated indirectly using the Trussell
P/F ratio technique with the assumption that the
number of children born in the period 12 months prior
to the survey among women age 15 to 49 years are
underreported.
- CBR is calculated indirectly by taking the crude birth rates
directly from the survey and multiplying by the Trussell P/F
ratio adjustment factor.
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Method to estimate fertility and
mortality
-The
General Growth Balance method (GGB) and Synthetic
Extinct Generation (SEG) methods were used to assess
and adjust data on reported deaths. The GGB method
requires three major assumptions: (1) a closed population,
that is a population not or only slightly affect by migration,
(2) invariant coverage of population and deaths by age;
and (3) accurate recording of age for both population and
deaths.
-The problem of changes in census coverage may be
resolved by combining the SEG and GGB methodologies.
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Method to estimate fertility and
mortality
Sex
Male
Female
Relative completeness of mortality
reporting by methodology, 2009
census
GGB
SEG Combined GGB –
SEG
72
71
67
65
53
54
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Method to estimate fertility and mortality

The United Nations has computerized indirect
estimation of mortality through the software
MORTPAK. In this software package, the CEBCS
procedure is used for estimating 1q0 and the
MATCH procedure for estimating e0. After
applying the CEBCS procedure over a period of
time, software programmers made adjustments
made to some coefficients in the regression
equation for estimating q(a) mentioned above and
developed a new software called QFIVE to
estimate 1q0 and 4q1.
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Challenges facing
while conducting
census evaluation
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-Indirect
technique requires some assumption, such as the
method to estimate fertility requires TFR is still high. Now,
TFR is becoming lower and lower. Therefore, we need to
develop that method.
- The method to estimate mortality met many difficulties.
The combined BBG-SEG method can apply for whole
country estimation (not affected by migration). For province
level, it was quite not appropriate. So we need to know
another method.
- IMR now is becoming lower and lower, so the
method to separate IMR by Coal Denemy model is not
suitable.
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General Statistics Office of Vietnam
THANK YOU FOR
YOUR KIND ATTENTION