Year Dollars 1997-01-01 502463 2002-01-01 1646383 2003-01-01 3144183 2004-01-01 3429633 2005-01-01 3108695 2006-01-01 13504918 2007-01-01 6508858 2008-01-01 648561 2009-01-01 845179 2016-01-01 4355182