Year Dollars 1992-01-01 3338204 1997-01-01 22675580 2003-01-01 19568851 2004-01-01 9384901 2005-01-01 6719891 2006-01-01 26893211 2007-01-01 14745735 2008-01-01 25100278 2009-01-01 8012530 2010-01-01 29687952 2011-01-01 6554895 2012-01-01 5179640 2013-01-01 5105833 2014-01-01 3573662 2015-01-01 3775420 2016-01-01 15067955