World Population Prospects: The 2006 Revision Population Database

http://esa.un.org/unpp/index.asp?panel=2

Latest population census PDF/Asia

http://www.census.gov/prod/2002pubs/c2kbr01-16.pdf

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CIA World Fact Book

Select a Country or Location World

https://www.cia.gov/library/publications/the-world-factbook/index.html

Asia is made up of several countries to my knowledge there is no one answer for the entirety of Asia. The link above will give you individual country information just select which country.

The link below is a map of the countries that make up the continent of Asia.

http://www.countryreports.org/map/asia.aspx

Here’s a site that I found:

http://www.unfpa.org/swp/2007/english/chapter_1/different_speeds.html