Year Dollars 1992-01-01 3477339 1997-01-01 6445459 2002-01-01 1982251 2003-01-01 3234352 2004-01-01 10832655 2005-01-01 12994893 2006-01-01 11253070 2007-01-01 6707232 2008-01-01 11773711 2009-01-01 10208106 2010-01-01 17408292 2011-01-01 17727501 2012-01-01 7956272 2013-01-01 6100623 2014-01-01 9975701 2015-01-01 9749414 2016-01-01 5956312