Year Dollars 1992-01-01 2337590 1997-01-01 2219461 2002-01-01 1604446 2003-01-01 1884451 2004-01-01 3824438 2005-01-01 4003231 2006-01-01 6189107 2007-01-01 3588932 2008-01-01 4438133 2009-01-01 3873196 2010-01-01 4217590 2011-01-01 4707527 2012-01-01 6852005 2013-01-01 12338977 2014-01-01 19011805 2015-01-01 11301703 2016-01-01 10321989