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# SOURCES OF DEMOGRAPHIC DATA

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## Noel Soberano

on 2 March 2014

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#### Transcript of SOURCES OF DEMOGRAPHIC DATA

SOURCES OF DEMOGRAPHIC DATA
1. Population Census
2. Vital Registration statistics system like birth, death, marriage, and divorce
3. Sample or special surveys like surveys of households
4. Demographic data gathered and processed by government agencies.
COMPONENTS OF POPULATION CHANGE
-Fertility (births)
-Mortality (deaths)
-Migration(immigration and emigration)

BATHTUB ANALOGY
FERTILITY
-refers to the actual no of children born to a woman or a group of women
Crude Birth Rate (CBR)– refers to the annual no of live births per 1000 people
To calculate crude birth rate or CBR, you can use the formula:
CBR = ( N / TP) x 1000
where:
N - represents the number of births in a specific time period
TP - is the total population during this period- usually a year.
EXAMPLE:
1. The total population of Philippines in 2009 was 92.227 Million . When the total number of live births in the year was 1,745,585 find out the crude birth rate (CBR).
ANS: 18.9 births per 1000 people
2. The total estimated population of the Philippines in year 2013 according to the CIA is about 105,720,644 (July 2013 estimate).It ranked as the 12th most populated country in the world. If the birth rate of the country was 24.62 births per 1000 people, what is the registered number of live births in that given year?
ANS: 2,602,842.255 Registered births in 2013

PHILIPINES CRUDE BIRTH RATE (1995-2014)
MORTALITY
-refers to the no of deaths per 1000 of the total midyear population in a particular place at a specified time, and is measured by the Crude Death Rate.
CRUDE DEATH RATE- refers to the annual no of deaths per 1000 people.
To calculate crude death rate or CDR, you can use the formula:
CDR = ( N / TP) x 1000
where:
N - represents the number of death in a specific time period
TP - is the total population during this period- usually a year.
EXAMPLE:
1.The number of registered deaths in the Philippines in 2009 was 479, 580. If the total population of the Philippines in that year was 92.227 Million, calculate the Crude Death Rate.
ANS: 5.2 deaths per 1000 people

PHILIPPINES' CRUDE DEATH RATE (1995-2013)
MIGRATION
-is another factor which affects population change
- refers to the spatial movements of a person or group of persons from one place to another, more or less for permanent residency
REASONS WHY PEOPLE MIGRATE:
-Economic
-Political
-Social
-Psychological
-Religious

PUSH AND PULL FACTORS IN MIGRATION:
PUSH-refers to the unfavourable or unattractive conditions which impel a person or group of persons to move out of an area e.g. Natural disasters( famines, floods, volcanic eruptions),political repressions, persecution, discrimination
PULL-refers to the favourable conditions or attractions of a locality which lure a person or group of persons to move into that area e.g. favourable climate, employment oppurtunities

2 TYPES OF MIGRATION:
1. INTERNAL MIGRATION- is the spatial movement of a person or group of persons within a country or specified territory more or less for permanent residency
2. INTERNATIONAL MIGRATION- is the spatial movement of a person from one country to another more or less for permanent residency.
IMMIGRATION- when one enters the country of destination
EMIGRATION- when one leaves ones country to move to another

END
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