Year Dollars 1992-01-01 79356377 1997-01-01 81751695 2002-01-01 159906198 2003-01-01 147438337 2004-01-01 159624062 2005-01-01 140303637 2006-01-01 174938663 2007-01-01 177693317 2008-01-01 216692508 2009-01-01 236889151 2010-01-01 328168416 2011-01-01 224665010 2012-01-01 272283054 2013-01-01 239891741 2014-01-01 328698672 2015-01-01 186015529 2016-01-01 216887879