Year Dollars 1992-01-01 476811 1997-01-01 1507299 2002-01-01 2285268 2003-01-01 2965613 2004-01-01 3653481 2005-01-01 3530281 2006-01-01 5709307 2007-01-01 4691900 2008-01-01 10063264 2009-01-01 6461361 2010-01-01 4264736 2011-01-01 7745500 2012-01-01 5837367 2013-01-01 5746987 2014-01-01 7139440 2015-01-01 6126225 2016-01-01 8732573