Year Dollars 1992-01-01 2449669 1997-01-01 3762901 2002-01-01 10951481 2003-01-01 13827645 2004-01-01 13159850 2005-01-01 13221066 2006-01-01 11820514 2007-01-01 15968135 2008-01-01 16691918 2009-01-01 17392243 2010-01-01 15820952 2011-01-01 36706927 2012-01-01 24517163 2013-01-01 32379595 2014-01-01 34473297 2015-01-01 25315097 2016-01-01 17755893