Year Dollars 1992-01-01 1444501 1997-01-01 670715 2006-01-01 140906275 2007-01-01 133588869 2008-01-01 236551576 2009-01-01 16424261 2011-01-01 964092 2012-01-01 4293834 2013-01-01 3590303 2014-01-01 4934369 2015-01-01 4523880