Year Dollars 1992-01-01 46644069 1997-01-01 46967086 2002-01-01 40426396 2003-01-01 36762974 2004-01-01 41578866 2005-01-01 46397887 2006-01-01 46587326 2007-01-01 67254408 2008-01-01 346123611 2010-01-01 270666852 2011-01-01 602867695 2012-01-01 428673861 2013-01-01 448653448 2014-01-01 385133294 2015-01-01 515096968 2016-01-01 468087247