Year Dollars 1992-01-01 34888283 1997-01-01 133894989 2002-01-01 39988357 2003-01-01 62049703 2004-01-01 67789240 2005-01-01 75820199 2006-01-01 89216146 2007-01-01 109440992 2008-01-01 135837520 2009-01-01 92170449 2010-01-01 121899310 2011-01-01 154944441 2012-01-01 160054889 2013-01-01 156797808 2014-01-01 144061672 2015-01-01 137254886 2016-01-01 138628276