Year Dollars 1992-01-01 452882 1997-01-01 6145091 2009-01-01 52324209 2010-01-01 14863003 2011-01-01 18425826 2012-01-01 21850197 2013-01-01 20022732 2014-01-01 14077872 2015-01-01 20179496 2016-01-01 41545689