Year Dollars 1992-01-01 13749337 1997-01-01 7327838 2002-01-01 6703321 2003-01-01 8910484 2004-01-01 9970764 2005-01-01 9243371 2006-01-01 12766674 2007-01-01 14776856 2008-01-01 22250625 2009-01-01 17470872 2010-01-01 11537741 2011-01-01 19326347 2012-01-01 34347859 2013-01-01 51888796 2014-01-01 48214549 2015-01-01 38024527 2016-01-01 14563133