Year Dollars 1992-01-01 16253640 1997-01-01 24358169 2002-01-01 29871808 2003-01-01 34168219 2004-01-01 30617962 2005-01-01 41417272 2006-01-01 44726783 2007-01-01 49910628 2008-01-01 64787324 2009-01-01 37556927 2010-01-01 47308121 2011-01-01 57438445 2012-01-01 60156431 2013-01-01 49734402 2014-01-01 56231960 2015-01-01 45880831 2016-01-01 42063608