Year Dollars 1997-01-01 21049 2002-01-01 1843361 2003-01-01 1021745 2004-01-01 2328389 2005-01-01 1037175 2006-01-01 707125 2007-01-01 1935503 2008-01-01 1323549 2009-01-01 1419173 2010-01-01 1239373 2011-01-01 2233660 2012-01-01 1568107 2013-01-01 3192439 2014-01-01 5760478 2015-01-01 7091623 2016-01-01 9159386