Year Dollars 1992-01-01 759890 1997-01-01 2687291 2002-01-01 2577548 2003-01-01 3056128 2004-01-01 4587937 2005-01-01 5633986 2006-01-01 7799615 2007-01-01 4053335 2008-01-01 20272518 2009-01-01 5919718 2010-01-01 6617196 2011-01-01 11895918 2012-01-01 8566162 2013-01-01 19588285 2014-01-01 17060232 2015-01-01 12375785 2016-01-01 13661969