Year Dollars 1992-01-01 52111969 1997-01-01 93439274 2002-01-01 30143860 2003-01-01 43585722 2004-01-01 51790795 2005-01-01 74679340 2006-01-01 86594214 2007-01-01 110838272 2008-01-01 124522130 2009-01-01 101215316 2010-01-01 138576686 2011-01-01 158214125 2012-01-01 175747525 2013-01-01 158332787 2014-01-01 176259385 2015-01-01 176447485 2016-01-01 182557821