Year Dollars 1992-01-01 28274504 1997-01-01 50704152 2002-01-01 69844895 2003-01-01 60957964 2004-01-01 59293500 2005-01-01 61365470 2006-01-01 97460102 2007-01-01 67353923 2008-01-01 72015263 2009-01-01 76064598 2010-01-01 133763362 2011-01-01 153656517 2012-01-01 141243423 2013-01-01 157623442 2014-01-01 178492456 2015-01-01 175702067 2016-01-01 188574718