Year Dollars 1997-01-01 49461 2002-01-01 115588 2003-01-01 336833 2004-01-01 192722 2005-01-01 55013 2006-01-01 850471 2007-01-01 159051 2008-01-01 94394 2009-01-01 188964 2010-01-01 854307 2011-01-01 500493