Year Dollars 1992-01-01 12178889 1997-01-01 17995572 2002-01-01 23598760 2003-01-01 24878603 2004-01-01 31433671 2005-01-01 29432012 2006-01-01 40196683 2007-01-01 66821517 2008-01-01 52196919 2009-01-01 62416443 2010-01-01 61231837 2011-01-01 73960070 2012-01-01 65943810 2013-01-01 66867965 2014-01-01 68831354 2015-01-01 74529754 2016-01-01 72299750