Year | Value | 2022 | 271.81333953712 | 2021 | 260.08282021557 | 2020 | 252.83079788886 | 2019 | 249.22442925618 | 2018 | 254.73219485859 | 2017 | 225.08768755772 | 2016 | 178.91988344961 | 2015 | 142.16478004292 | 2014 | 128.76977073372 | 2013 | 125.71128872574 | 2012 | 122.51867500575 | 2011 | 115.51848153176 | 2010 | 100 | 2009 | 97.27636394856 | 2008 | 94.940912206059 | 2007 | 86.027804597013 | 2006 | 80.966592738609 | 2005 | 79.802066116321 | 2004 | 77.741749784582 | 2003 | 79.488564843005 | 2002 | 81.269298640427 | 2001 | 90.096650464788 | 2000 | 98.805286702655 | 1999 | 101.75621699553 | 1998 | 99.130621039525 | 1997 | 95.585108252224 | 1996 | 92.307904540719 | 1995 | 88.733644352441 | 1994 | 82.744602482001 | 1993 | 78.719966345065 | 1992 | 70.87192587804 | 1991 | 64.806224271658 | 1990 | 57.916430503904 | 1989 | 53.40308855034 | 1988 | 52.607743789946 | 1987 | 49.589266687244 | 1986 | 47.51945381682 | 1985 | 46.005424031973 | 1984 | 42.153272300906 | 1983 | 37.477028408466 | 1982 | 33.883603286202 | 1981 | 30.730971645602 | 1980 | 27.635834806959 | 1979 | 25.184320334603 | 1978 | 26.802958717446 | 1977 | 20.716495099255 | 1976 | 19.492334940929 | 1975 | 18.47978759535 | 1974 | 16.935413331748 | 1973 | 15.759964047278 | 1972 | 14.596492846589 | 1971 | 14.633225636688 | 1970 | 15.101967980462 | 1969 | 15.94655686084 | 1968 | 14.525131745119 | 1967 | 14.468526320192 | 1966 | 13.484670124376 | 1965 | 12.013827574191 | 1964 | 10.781985707181 |
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