Year Dollars 1997-01-01 1536035 2002-01-01 272975 2003-01-01 962978 2004-01-01 301245 2005-01-01 451560 2006-01-01 455621 2007-01-01 373216 2008-01-01 460756 2009-01-01 727527 2011-01-01 468961 2012-01-01 466007 2013-01-01 638339 2015-01-01 271404 2016-01-01 152521