Year Dollars 2002-01-01 2273687 2003-01-01 1713869 2004-01-01 1686016 2005-01-01 2098136 2006-01-01 4142457 2007-01-01 15160525 2008-01-01 17711386 2009-01-01 15955487 2010-01-01 12634778 2011-01-01 16605748 2012-01-01 16319055 2013-01-01 23499247 2015-01-01 28723788