Year Dollars 1992-01-01 7496336 1997-01-01 20189474 2002-01-01 57742570 2003-01-01 108709479 2004-01-01 158915383 2005-01-01 110611858 2006-01-01 62224060 2007-01-01 42550534 2008-01-01 39457077 2009-01-01 24849151 2010-01-01 23231963 2011-01-01 32832164 2012-01-01 25188566 2013-01-01 23637575 2014-01-01 21734283 2015-01-01 22272808 2016-01-01 20655251