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US Population Estimate: 316,158,691 at 23:59 UTC (EST+5) Jun 30, 2015
Wednesday December 31, 1969

World Population Estimate: 7,250,104,511 at 23:59 UTC (EST+5) Jun 30, 2015
Wednesday December 31, 1969

http://www.census.gov/main/www/rss/popclocks.xml
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