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The percent of those with a bachelor’s degree or higher was estimated to be 8.3% of the population. [14] 22.0% of the population was under the age of 18, 4.7% from 18 to 24, 25.3% from 25 to 44, 21.7% from 45 to 64, and 26.4% who were 65 years of age or older. The median age was 42.3 years. For every 100 females, there were 109.2 males. [9]
This template quickly calculates the population growth rate given two pairs of years and populations using the formula from Population growth:
In demography and population dynamics, the rate of natural increase (RNI), also known as natural population change, is defined as the birth rate minus the death rate of a particular population, over a particular time period. [1] It is typically expressed either as a number per 1,000 individuals in the population [2] or as a percentage. [3]
Map of the United States with Kansas highlighted. Kansas is a state located in the Midwestern United States that is divided into 105 counties and contains 44 census-designated places (CDPs). [1] All population data is based on the 2010 census.
The algebraic symbols b, d and r stand for the rates of birth, death, and the rate of change per individual in the general population, the intrinsic rate of increase. This formula can be read as the rate of change in the population (dN/dt) is equal to births minus deaths (B − D). [2] [13] [17]
China's population is projected to crash 55% by the turn of the next century. Italy's will sink 41%, and Brazil's will drop 23%. Top economies face ‘population collapse’ as fertility rates ...
As the United States has grown in area and population, new states have been formed out of U.S. territories or the division of existing states. The population figures provided here reflect modern state boundaries. Shaded areas of the tables indicate census years when a territory or the part of another state had not yet been admitted as a new state.
In the study of age-structured population growth, probably one of the most important equations is the Euler–Lotka equation.Based on the age demographic of females in the population and female births (since in many cases it is the females that are more limited in the ability to reproduce), this equation allows for an estimation of how a population is growing.