Year Dollars 1997-01-01 3472399 2002-01-01 2143082 2003-01-01 6914628 2004-01-01 3959258 2005-01-01 6387016 2006-01-01 7370247 2007-01-01 7455198 2008-01-01 14103364 2009-01-01 8821356 2010-01-01 11911135 2011-01-01 7560264 2012-01-01 8846109 2013-01-01 7274403 2014-01-01 15663062 2015-01-01 14391659 2016-01-01 8534065