Year Dollars 1992-01-01 11454218 1997-01-01 31441856 2002-01-01 42905170 2003-01-01 31549817 2004-01-01 36357226 2005-01-01 62704836 2006-01-01 82985284 2007-01-01 92521132 2008-01-01 176746136 2009-01-01 82258896 2010-01-01 117260729 2011-01-01 158398769 2012-01-01 151883757 2013-01-01 139815389 2014-01-01 180317830 2015-01-01 144855589 2016-01-01 171905188