Year Dollars 1992-01-01 9793339 1997-01-01 18886858 2002-01-01 32306248 2003-01-01 38229884 2004-01-01 39364105 2005-01-01 38688512 2006-01-01 51201322 2007-01-01 44813792 2008-01-01 50482495 2009-01-01 52248848 2010-01-01 53257722 2011-01-01 60881205 2012-01-01 69206378 2013-01-01 70601417 2014-01-01 63701925 2015-01-01 58165247 2016-01-01 55341473