Year US Dollars adjusted for inflation) 1995 1086.93603 1996 1025.10659 1997 1045.85166 1998 977.825 1999 946.37419 2000 968.28818 2001 1029.65376 2002 1112.54019 2003 1189.31217 2004 1280.48592 2005 1379.87562 2006 1450.13431 2007 1497.10383 2008 1616.95279 2009 1521.85557 2010 1631.53583 2011 1743.48808 2012 1731.5108 2013 1894.78011 2014 1986.94062 2015 1980.26741 2016 2070.63437 2017 2165.1564