Year Dollars 1992-01-01 3117516 1997-01-01 3186518 2002-01-01 10170951 2003-01-01 10136255 2004-01-01 15175289 2005-01-01 22086753 2006-01-01 38665011 2007-01-01 50388279 2008-01-01 39732567 2009-01-01 10257911 2010-01-01 14618746 2011-01-01 17800735 2012-01-01 67144580 2013-01-01 72890198 2014-01-01 15573734 2015-01-01 19026256 2016-01-01 26153720