Year Dollars 1992-01-01 470344 1997-01-01 634836 2002-01-01 1227777 2003-01-01 1521709 2004-01-01 1096588 2005-01-01 1644579 2006-01-01 2084235 2007-01-01 3498730 2008-01-01 1857722 2009-01-01 1864245 2010-01-01 4060339 2011-01-01 3188116 2012-01-01 2468360 2013-01-01 3135966 2014-01-01 2738109 2015-01-01 5110620 2016-01-01 2507479