Year US Dollars adjusted for inflation) 2001 862.90337 2002 863.49405 2003 898.6528 2004 911.0056 2005 952.67977 2006 1015.39539 2007 1024.17906 2008 1082.71488 2009 1083.66427 2010 1129.75496 2011 1152.89978 2012 1162.5374 2013 1191.43677 2014 1241.45937 2015 1260.62751 2016 1284.68839 2017 1305.62191