Year Dollars 1992-01-01 14856398 1997-01-01 10730397 2002-01-01 13284976 2003-01-01 15084910 2004-01-01 18643032 2005-01-01 16204972 2006-01-01 17780498 2007-01-01 23473956 2008-01-01 26150548 2009-01-01 21231190 2010-01-01 33679400 2011-01-01 38840919 2012-01-01 37400593 2013-01-01 44851162 2014-01-01 155346662 2015-01-01 31291018 2016-01-01 29653107