Year Dollars 1992-01-01 141619797 1997-01-01 218481253 2002-01-01 324379637 2003-01-01 364993593 2004-01-01 448279234 2005-01-01 552285285 2006-01-01 694118672 2007-01-01 1139356911 2008-01-01 1526899251 2009-01-01 1336709329 2010-01-01 1787759634 2011-01-01 2391318726 2012-01-01 2459029219 2013-01-01 2910062997 2014-01-01 2657885918 2015-01-01 2322175173