Year Dollars 1992-01-01 494193 1997-01-01 1135435 2002-01-01 1091072 2003-01-01 2906565 2004-01-01 1514559 2005-01-01 2411321 2006-01-01 1494251 2007-01-01 2166768 2008-01-01 5041706 2009-01-01 5128451 2010-01-01 7545783 2011-01-01 3125557 2012-01-01 3906418 2013-01-01 4535075 2014-01-01 5371602 2015-01-01 4014589 2016-01-01 4029787