Year Dollars 1997-01-01 533567 2002-01-01 294165 2003-01-01 2189197 2004-01-01 10172554 2005-01-01 17086261 2006-01-01 9146762 2007-01-01 12609387 2008-01-01 10164634 2009-01-01 18513481 2010-01-01 31889062 2011-01-01 23205899 2012-01-01 20399111 2013-01-01 19112221 2014-01-01 7568850 2015-01-01 7173752 2016-01-01 15720049