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  2. Natality in population ecology - Wikipedia

    en.wikipedia.org/wiki/Natality_in_population_ecology

    Natality is shown as a crude birth rate or specific birth rate. Crude birth rate is used when calculating population size (number of births per 1000 population/year), whereas specific birth rate is used relative to a specific criterion such as age. By calculating specific birth rate, the results are seen in an age-specific schedule of births.

  3. List of countries by rate of natural increase - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by_rate...

    Rates are the average annual number of births or deaths during a year per 1,000 persons; these are also known as crude birth or death rates. Column four is from the UN Population Division [3] and shows a projection for the average natural increase rate for the time period shown using the medium fertility variant. Blank cells in column four ...

  4. List of countries by birth rate - Wikipedia

    en.wikipedia.org/.../List_of_countries_by_birth_rate

    Crude birth rate refers to the number of births over a given period divided by the person-years lived by the population over that period. It is expressed as number of births per 1,000 population. The article lists 233 countries and territories in crude birth rate. The first list is provided by Population Reference Bureau. [1]

  5. Birth rate - Wikipedia

    en.wikipedia.org/wiki/Birth_rate

    The other aberration from this otherwise-steady decline in teen birth rates is the six percent decrease in birth rates for 15- to 19-year-olds between 2008 and 2009. [65] Despite the decrease, U.S. teen birth rates remain higher than those in other developed nations. [ 65 ]

  6. File:Crude Birth Rate Map by Country.svg - Wikipedia

    en.wikipedia.org/wiki/File:Crude_Birth_Rate_Map...

    English: Crude birth rates of sovereign states plus Greenland, French Guiana, New Caledonia, and Puerto Rico. Birth rate should not be confused with the generally more useful total fertility rate, which adjusts figures to account for how many females of reproductive age there are.

  7. How a Declining Birth Rate Will Affect Social Security and ...

    www.aol.com/declining-birth-rate-affect-social...

    The U.S. birth rate has been steadily declining for years, but fairly recently it has tipped over into an alarming category. The estimated “replacement fertility rate,” or the number of births ...

  8. Sub-replacement fertility - Wikipedia

    en.wikipedia.org/wiki/Sub-replacement_fertility

    A map of when European fertility rates fell below replacement levels Map of countries by crude birth rate. Map of countries by total fertility rate. Sub-replacement fertility is a total fertility rate (TFR) that (if sustained) leads to each new generation being less populous than the older, previous one in a given area.

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