Year Dollars 1992-01-01 281760 1997-01-01 2907426 2004-01-01 966729 2005-01-01 429823 2006-01-01 943826 2008-01-01 2051480 2009-01-01 4448142 2011-01-01 17111636 2014-01-01 3395467 2016-01-01 821904