Year Dollars 1992-01-01 2947469 1997-01-01 4357744 2002-01-01 10002481 2004-01-01 20376441 2005-01-01 3735091 2006-01-01 10006266 2007-01-01 15255123 2008-01-01 28328868 2009-01-01 17194174 2010-01-01 14054959 2011-01-01 24215221 2012-01-01 40885759 2013-01-01 36578561 2014-01-01 32578185 2015-01-01 33809567 2016-01-01 30563278