Year | Value | 2022 | 113.93979679043 | 2021 | 109.14443072833 | 2020 | 107.52065330928 | 2019 | 108.1853575159 | 2018 | 107.27376317539 | 2017 | 106.42863925553 | 2016 | 106.1532617985 | 2015 | 106.74199981008 | 2014 | 107.38771246795 | 2013 | 106.87494065141 | 2012 | 105.22267590922 | 2011 | 103.48494919761 | 2010 | 100 | 2009 | 97.379166271009 | 2008 | 94.217073402336 | 2007 | 90.114898870003 | 2006 | 89.706580571646 | 2005 | 87.892887664989 | 2004 | 86.753394739341 | 2003 | 87.085746842655 | 2002 | 86.478017282309 | 2001 | 81.75861741525 | 2000 | 80.828031525971 | 1999 | 80.001899154876 | 1998 | 76.06115278701 | 1997 | 72.101414870383 | 1996 | 66.166555882632 | 1995 | 59.386572975026 | 1994 | 54.0214604501 | 1993 | 48.11508878549 | 1992 | 43.376697369671 | 1991 | 38.723767923274 | 1990 | 32.504035704112 | 1989 | 27.737156965151 | 1988 | 23.046244421233 | 1987 | 19.798689583135 | 1986 | 16.627100940082 | 1985 | 11.242996866394 | 1984 | 2.7426512486943 | 1983 | 0.57957745703162 | 1982 | 0.23564701357896 | 1981 | 0.10693517899535 | 1980 | 0.049324336720159 | 1979 | 0.021350216503656 | 1978 | 0.011973648276517 | 1977 | 0.0079532213465008 | 1976 | 0.0059080489032381 | 1975 | 0.0044992841135695 | 1974 | 0.0032297679232741 | 1973 | 0.0023122627480771 | 1972 | 0.0019263658721869 | 1971 | 0.0017065386003229 | 1970 | 0.0015240684645333 | 1969 | 0.0014362998837727 | 1968 | 0.0014018418505016 | 1967 | 0.0013732881432519 | 1966 | 0.0013502515931771 | 1965 | 0.0012510395580934 | 1964 | 0.0011615067471378 | 1963 | 0.001104379929652 | 1962 | 0.0010361870373682 | 1961 | 0.00094708357650223 | 1960 | 0.00088686688142157 |
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