Year Dollars 1992-01-01 30516794 1997-01-01 45887530 2002-01-01 54446222 2003-01-01 54205044 2004-01-01 60429210 2005-01-01 67366849 2006-01-01 51556605 2007-01-01 91674271 2008-01-01 61424110 2009-01-01 58301445 2010-01-01 49591093 2011-01-01 69003159 2012-01-01 142065161 2013-01-01 99957376 2014-01-01 40743854 2015-01-01 23989957 2016-01-01 13025946