Year Dollars 1992-01-01 15888522 1997-01-01 22128311 2002-01-01 33583440 2003-01-01 35008410 2004-01-01 31053497 2005-01-01 45140750 2006-01-01 82633619 2007-01-01 76573110 2008-01-01 76648385 2009-01-01 71555640 2010-01-01 77173793 2011-01-01 101998207 2012-01-01 96307234 2013-01-01 93462542 2014-01-01 100395063 2015-01-01 92541471 2016-01-01 151212953