Year Dollars 1992-01-01 438117975 1997-01-01 264467673 2002-01-01 162345174 2003-01-01 183878198 2004-01-01 229093289 2005-01-01 310305622 2006-01-01 284686965 2007-01-01 287144912 2008-01-01 387428882 2009-01-01 275689797 2010-01-01 373370059 2011-01-01 384997045 2012-01-01 391160371 2013-01-01 438713589 2014-01-01 426412032 2015-01-01 422745370 2016-01-01 418783687