Year Dollars 1992-01-01 13580661 1997-01-01 7330477 2002-01-01 3818010 2003-01-01 1616868 2004-01-01 1383871 2005-01-01 6156078 2006-01-01 6638400 2007-01-01 4241197 2008-01-01 2457351 2010-01-01 6942518 2011-01-01 13615014 2012-01-01 3091172 2013-01-01 1298750 2014-01-01 991239 2015-01-01 1489634 2016-01-01 532083