Year Dollars 1992-01-01 4710252 2002-01-01 16193334 2003-01-01 15810693 2004-01-01 12813447 2005-01-01 5223366 2006-01-01 4464266 2007-01-01 17503139 2008-01-01 32229049 2009-01-01 20901754 2010-01-01 20856891 2011-01-01 34779800 2012-01-01 34630675 2013-01-01 21985515 2014-01-01 38666977 2015-01-01 29353028 2016-01-01 29613301