Year Dollars 1992-01-01 1651566 1997-01-01 1317069 2002-01-01 6811223 2003-01-01 7610018 2004-01-01 10082920 2005-01-01 4764630 2006-01-01 3644992 2007-01-01 7857607 2008-01-01 10828470 2011-01-01 6805946 2012-01-01 4362665 2013-01-01 4726564 2014-01-01 9373476 2015-01-01 11504375 2016-01-01 15667253