Year Dollars 1992-01-01 5496561 1997-01-01 11120364 2002-01-01 17759886 2003-01-01 13521891 2004-01-01 20771911 2005-01-01 18683761 2006-01-01 19646873 2007-01-01 18514532 2008-01-01 24559473 2009-01-01 24012724 2010-01-01 23086378 2011-01-01 26049999 2012-01-01 29240991 2013-01-01 41106210 2014-01-01 34927031 2015-01-01 41629019 2016-01-01 46311671