Year 2010 = 100 1971 5.5047043203062 1972 5.83911510773811 1973 6.32628144010019 1974 7.79190896535785 1975 8.60935755693913 1976 9.26854589928368 1977 9.68827960374936 1978 10.2501998206699 1979 10.8411848764987 1980 12.1491026230048 1981 13.1276188630804 1982 13.8542398333616 1983 14.9490154284884 1984 16.0583234432146 1985 16.6541526388452 1986 17.5624288516967 1987 18.1485697677235 1988 19.1367742873059 1989 19.9941870322378 1990 21.3844551553758 1991 22.8740281444522 1992 23.8598105941337 1993 25.046624845593 1994 25.7611354663696 1995 30.2128999442924 1996 33.7249013006515 1997 35.061883885969 1998 39.8212512413108 1999 45.767432848112 2000 52.9052728461743 2001 57.8244968149781 2002 64.6474677259186 2003 74.1565141569986 2004 75.7575023615182 2005 77.1065952963403 2006 78.932836001647 2007 79.6521907622254 2008 88.2238961416427 2009 94.3275122920047 2010 100 2011 104.44083401029 2012 109.179528838343 2013 114.595180070404 2014 120.579474681831 2015 127.809369076631 2016 136.339019767127 2017 143.73138369889 2018 150.018897576695 2019 155.912649364765 2020 163.508205344215 2021 170.839243117812 2022 179.813837244105 2023 183.94721776434