Year Dollars 1992-01-01 5265567 1997-01-01 4841522 2002-01-01 3556390 2003-01-01 8511877 2004-01-01 4510010 2005-01-01 46419681 2006-01-01 35020453 2007-01-01 17989831 2008-01-01 33802762 2009-01-01 15620209 2010-01-01 19860617 2011-01-01 23609023 2012-01-01 22914829 2013-01-01 31521733 2014-01-01 26829231 2015-01-01 32518789 2016-01-01 14189220