Year US Dollars adjusted for inflation) 1991 65073.652 1992 67740.258 1993 71530.227 1994 75103.852 1995 79382.891 1996 81453.484 1997 84350.766 1998 86507.742 1999 87284.688 2000 90897.805 2001 91573.953 2002 92702.727 2003 94672.297 2004 98614.945 2005 98579.773 2006 100603.438 2007 103730.289 2008 102922.641 2009 97441.812 2010 100916.031 2011 102360.461 2012 100567.562 2013 100900.516 2014 100639.961 2015 101393.914 2016 102367.375 2017 104810.664 2018 107155.078 2019 108857.273 2020 110697.359 2021 112471.195 2022 113995.516