Year Dollars 1992-01-01 122766881 1997-01-01 151875647 2002-01-01 132601903 2003-01-01 128835428 2004-01-01 203074976 2005-01-01 198716351 2006-01-01 251343171 2007-01-01 321778857 2008-01-01 369891068 2009-01-01 297946759 2010-01-01 434654327 2011-01-01 478465407 2012-01-01 437082636 2013-01-01 336136056 2014-01-01 344862232 2015-01-01 368040734 2016-01-01 351195921