Year Dollars 1992-01-01 1123470 1997-01-01 2358729 2002-01-01 3667275 2003-01-01 5076671 2004-01-01 3484955 2005-01-01 3073311 2006-01-01 6072738 2007-01-01 6494623 2008-01-01 8775572 2009-01-01 4745014 2010-01-01 7993488 2011-01-01 2644919