Year Dollars 1997-01-01 148982 2002-01-01 2059011 2003-01-01 81959 2004-01-01 228463 2005-01-01 236766 2006-01-01 475890 2007-01-01 80396 2008-01-01 126696 2011-01-01 241727 2012-01-01 63886