Year Dollars 1992-01-01 17950481 1997-01-01 21183330 2003-01-01 17026252 2004-01-01 12271973 2005-01-01 10751008 2006-01-01 18720401 2007-01-01 12459034 2008-01-01 14778701 2009-01-01 11187055 2010-01-01 8540472 2011-01-01 11464896 2012-01-01 12611745 2013-01-01 28237451 2014-01-01 15698766 2015-01-01 20100837 2016-01-01 15400985