Year Dollars 1992-01-01 14797710 1997-01-01 29077380 2002-01-01 17395255 2003-01-01 18711862 2004-01-01 12207569 2005-01-01 20734019 2006-01-01 43582604 2007-01-01 79262870 2008-01-01 47770412 2009-01-01 34314911 2010-01-01 29860231 2011-01-01 16466926 2012-01-01 15735566 2013-01-01 36397194 2014-01-01 39621364 2015-01-01 41094150 2016-01-01 31892531