Year Dollars 1992-01-01 3973448 1997-01-01 2219799 2002-01-01 5097945 2003-01-01 6545524 2004-01-01 4827236 2005-01-01 5017529 2006-01-01 10044690 2007-01-01 16506305 2008-01-01 5655881 2009-01-01 5029713 2010-01-01 6471577 2011-01-01 14711232 2012-01-01 12682191 2013-01-01 3116960 2014-01-01 2427437 2015-01-01 1298206 2016-01-01 356899