Year Dollars 1992-01-01 18984278 1997-01-01 41898416 2002-01-01 43443156 2003-01-01 21533986 2004-01-01 40361664 2005-01-01 59892594 2006-01-01 99339993 2007-01-01 97466017 2008-01-01 91748673 2009-01-01 56507740 2010-01-01 64987608 2011-01-01 94972138 2012-01-01 93726423 2013-01-01 66078758 2014-01-01 60288606 2015-01-01 25140840 2016-01-01 21069843