Year Dollars 1992-01-01 40544257 1997-01-01 10957521 2003-01-01 11278915 2004-01-01 15878421 2005-01-01 17176798 2006-01-01 15350339 2007-01-01 20099811 2008-01-01 32601608 2009-01-01 35169004 2010-01-01 40702567 2011-01-01 35822996 2012-01-01 41480020 2013-01-01 38706923 2014-01-01 22330821 2015-01-01 8617457 2016-01-01 7293462