Year 2010 = 100 1972 2.2356448584762 1973 2.31138801760892 1974 2.35292458872911 1975 2.44332771417658 1976 2.57107461965643 1977 2.67157524479608 1978 2.79679579015409 1979 3.04784771278195 1980 3.3308665063552 1981 3.48613198213672 1982 3.72443716935761 1983 3.9955723119203 1984 4.33391157677774 1985 4.63478667124699 1986 4.88004390243902 1987 5.30335424252834 1988 6.13722974922707 1989 7.18971260735142 1990 9.22940529027825 1991 12.4428574373068 1992 15.386305049811 1993 18.8427207145311 1994 22.3979793885263 1995 28.7378323600137 1996 35.4823229130883 1997 41.9773885262796 1998 47.9187798007557 1999 52.7095767777396 2000 57.8770182068018 2001 63.1535554792167 2002 66.4788732394366 2003 69.5774647887324 2004 74.2700103057368 2005 76.9151494331844 2006 79.9381655788388 2007 86.3002404671934 2008 91.5149433184472 2009 95.3692889041566 2010 100 2011 103.929920989351 2012 109.804190999656 2013 111.707317073171 2014 111.453108897286 2015 111.384403984885 2016 111.824115424253 2017 114.450017176228 2018 117.712126417039 2019 121.642047406389 2020 125.688766746822 2021 132.112676056338 2022 151.411885949845 2023 177.341119890072