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In ecology, a population is a group of organisms of the same species which inhabit the same geographical area and are capable of interbreeding. [2] [3] The area of a sexual population is the area where interbreeding is possible between any opposite-sex pair within the area and more probable than cross-breeding with individuals from other areas.
Population composition is the description of population defined by characteristics such as age, race, sex or marital status. These descriptions can be necessary for understanding the social dynamics from historical and comparative research.
Demographic statistics are measures of the characteristics of, or changes to, a population. Records of births, deaths, marriages, immigration and emigration and a regular census of population provide information that is key to making sound decisions about national policy. [1] [2] A useful summary of such data is the population pyramid. It ...
As of 2009, the average birth rate (unclear whether this is the weighted average rate per country [with each country getting a weight of 1], or the unweighted average of the entire world population) for the whole world is 19.95 per year per 1000 total population, a 0.48% decline from 2003's world birth rate of 20.43 per 1000 total population.
With a population getting close to 23 million people according to the 2023 US Census estimates, [7] [12] Florida is the most populous state in the Southeastern United States, and the second-most populous state in the South behind Texas. Within the United States, it contains the highest percentage of people over 65 (17.3%), and the 8th fewest ...
Population geographyis the study of the distribution, composition, migration, and growth of human populations in relation to the geographic characteristics of specific area. It focuses on how populations are distributed across space, the factors influencing these distributions, and the implications for resources, environment, and societal ...
The main driver of population growth is immigration, [8] [9] with 6.2% of the country's population being made up of temporary residents as of 2023, [10] or about 2.5 million people. [11] Between 2011 and May 2016, Canada's population grew by 1.7 million people, with immigrants accounting for two-thirds of the increase.
In 1941 the estimated population of the Philippines reached 17,000,000. [40] Manila's population was 684,000. [41] By then, some 27% of the population could speak English as a second language, while the number of Spanish speakers as first language had further fallen to 3% from 10 to 14% at the beginning of the century.