Year Dollars 1992-01-01 711766 1997-01-01 9177207 2002-01-01 3387498 2003-01-01 5809036 2004-01-01 2805941 2005-01-01 3188191 2006-01-01 7873063 2007-01-01 9618350 2008-01-01 7830184 2009-01-01 8473373 2010-01-01 16160127 2011-01-01 18182424 2012-01-01 17322129 2013-01-01 10729135 2014-01-01 11701676 2015-01-01 15261064 2016-01-01 16049154