Year Dollars 1997-01-01 44533 2003-01-01 56644 2004-01-01 94564 2005-01-01 589654 2006-01-01 506353 2007-01-01 321902 2008-01-01 334232 2009-01-01 457091 2010-01-01 357059 2011-01-01 50414