Year Dollars 1992-01-01 412271 1997-01-01 1773169 2002-01-01 1453172 2003-01-01 4870492 2004-01-01 1329232 2005-01-01 3123754 2006-01-01 5108591 2007-01-01 6858042 2008-01-01 6464851 2009-01-01 7866187 2010-01-01 4787132 2011-01-01 17486147 2012-01-01 6428848 2013-01-01 4117478 2014-01-01 2366492 2015-01-01 4422789 2016-01-01 8767376