Estimates

Where to find official estimates for the population growth of various countries?

I need estimates going out 50 years in the future and am having a hard time finding a reliable source of data. Can anyone help?

Public Comments

1. http://www.census.gov/ipc/www/idb/summaries.html http://www.census.gov/ipc/www/idb/ http://www.un.org/esa/population/publications/wpp2006/WPP2006_Highlights_rev.pdf http://unstats.un.org/unsd/cdb/cdb_topic_xrxx.asp?topic_code=1