Year Dollars 1992-01-01 4657315 1997-01-01 1010114 2002-01-01 1526857 2003-01-01 2652338 2004-01-01 3291260 2005-01-01 3614101 2006-01-01 4387667 2007-01-01 5883219 2008-01-01 4828788 2009-01-01 3508478 2010-01-01 7120795 2011-01-01 4983283 2012-01-01 6180086 2013-01-01 6508967 2014-01-01 6774387 2015-01-01 5724512 2016-01-01 8131747