Year Dollars 1992-01-01 49410512 1997-01-01 48908851 2002-01-01 89406862 2003-01-01 129264991 2004-01-01 147618436 2005-01-01 172662781 2006-01-01 160420696 2007-01-01 181672341 2008-01-01 162863895 2009-01-01 229308104 2010-01-01 158958132 2011-01-01 127508254 2012-01-01 201842323 2013-01-01 151329238 2014-01-01 169715980 2015-01-01 167512961 2016-01-01 139571072