population pyramid उदाहरण वाक्य

|Historical evolution of the population pyramid of Matelica ( by five-year age group ) based on residing population between 1982 and 2009.
Sources for Youth Bulge are on the Population Pyramid talk page . talk ) 01 : 35, 2 May 2009 ( UTC)
:: : I tidied up Gunnar Heinsohn, and I've proposed splitting Youth bulge into its own article-it doesn't sit right in Population pyramid.
Their population pyramid had a narrow base with a rapid increase until the 15 19 age group, indicating a rapid decline in total fertility rates.
Starting from around 2030, the unfavorable structure of the population pyramid had been forecast create a ratio of active to retired workers of 1 : 1.

This is very evident in the very broad base of the population pyramid in the region which has prevailed since 1970 but at a declining rate.
Where can I find a population pyramid of the entire planet ? ( Not a country ) talk ) 01 : 46, 4 February 2011 ( UTC)
To get an accurate estimate, one would need to use the population pyramid for each country or region, and find out the average height of each age range.
For countries with a wide base in their population pyramid it will take a generation for the people who are of child bearing age to have their families.
The population pyramid for Cowdenbeath, derived from 2011 UK Census data exhibits a typically mature house shape, where population only really begins to taper off above the age of 75.