Population Characteristics Population Part III. World Population Growth Birth rate (b) − death rate (d) = rate of natural increase (r)

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Population Characteristics Population Part III

World Population Growth Birth rate (b) − death rate (d) = rate of natural increase (r)

Population Characteristics Crude Birth Rate (CBR) Crude Death Rate (CDR) Natural Increase Rate (NIR) Doubling Time Total Fertility Rate (TFR) Infant Mortality Rate (IMR)

Population Characteristics Crude Birth Rate : The total number of live births in a year for every 1,000 people alive in the society. – Crude Birth Rate = Births in a year 1000 people *Highest CBR (2013)-Chad 51

F Crude Birth Rate : The total number of live births in a year for every 1,000 people alive in the society.

Population Characteristics Crude Death Rate : The total number of deaths in a year for every 1,000 people alive in the society. – Crude Death Rate = Deaths in a year 1000 people *Highest CDR (2013)-Sierra Leone 18

F Crude Death Rate : The total number of deaths in a year for every 1,000 people alive in the society.

Population Characteristics Natural Increase: The percentage growth of a population in a year, computed as the crude birth rate minus the crude death rate. –not including migration –usually measured in percentages (out of 100) – Rate of Natural Increase = Natural Increase Population x 100

F Natural Increase: The percentage growth of a population in a year, computed as the crude birth rate minus the crude death rate.

Rate of Natural Increase USA Population NIR 0.4% Serbia’s Population NIR -0.5% Gambia’s Population NIR 3.1% What do these numbers imply?

Population Characteristics Doubling Time: The number of years needed to double a population, assuming a constant rate of natural increase.

Population Characteristics Total Fertility Rate: The average number of children a woman will have throughout her childbearing years. Infant Mortality Rate: annual number of deaths of infants under age 1, compared to total live births – IMR = Infant(less than 1 year) deaths 1000 live births *Sierra Leone-Highest Current IMR-128

 Infant Mortality Rate: - the number of deaths of children under the age of 1, per thousand of the general population.

Population Characteristics Life Expectancy : The average number of years an individual can be expected to live, given current social, economic, and medical conditions. Life Expectancy at Birth in 2013 Men Women US Japan Nepal Kenya Swaziland 49 48

F Life Expectancy : The average number of years an individual can be expected to live, given current social, economic, and medical conditions.

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