Year Dollars 1992-01-01 32204775 1997-01-01 45073419 2002-01-01 20213382 2003-01-01 15896729 2004-01-01 20624069 2005-01-01 16832645 2006-01-01 20926581 2007-01-01 21178224 2008-01-01 20800620 2009-01-01 12167800 2010-01-01 13098027 2011-01-01 16912976 2012-01-01 17353717 2013-01-01 22875152 2014-01-01 25949075 2015-01-01 38740973 2016-01-01 36604176