Year Dollars 1992-01-01 5837306 1997-01-01 17673234 2002-01-01 14911410 2003-01-01 19759583 2004-01-01 20879811 2005-01-01 20205950 2006-01-01 20178442 2007-01-01 24764744 2008-01-01 24259901 2009-01-01 15034653 2010-01-01 33495445 2011-01-01 31379671 2012-01-01 38481648 2013-01-01 34279292 2014-01-01 38771460 2015-01-01 34255908 2016-01-01 38721588