07/01/09 6,768,167,712 08/01/09 6,774,705,647 09/01/09 6,781,243,583 10/01/09 6,787,570,618 11/01/09 6,794,108,554 12/01/09 6,800,435,588 01/01/10 6,806,973,524 02/01/10 6,813,511,460 03/01/10 6,819,416,692 04/01/10 6,825,954,628 05/01/10 6,832,281,663 06/01/10 6,838,819,599 07/01/10 6,845,146,634
Source: U.S. Census Bureau, International Data Base.