Year Dollars 1992-01-01 1522746 1997-01-01 2888069 2002-01-01 2347744 2003-01-01 5690861 2004-01-01 15568887 2005-01-01 2321091 2006-01-01 20081260 2007-01-01 8234038 2008-01-01 14421638 2009-01-01 13844615 2010-01-01 20057083 2011-01-01 38872319 2012-01-01 54411826 2013-01-01 157209472 2014-01-01 31035631 2015-01-01 23804553 2016-01-01 37323337