Year Dollars 1992-01-01 18843334 1997-01-01 36787279 2002-01-01 22327455 2003-01-01 22479289 2004-01-01 37068148 2005-01-01 44531818 2006-01-01 45861683 2007-01-01 40849807 2008-01-01 39637851 2009-01-01 47486330 2010-01-01 66945555 2011-01-01 128382599 2012-01-01 66984330 2013-01-01 72450728 2014-01-01 54193864 2015-01-01 44295302 2016-01-01 35023996