Year | Value | 2022 | 194.53778130621 | 2021 | 165.29789097529 | 2020 | 165.94732041763 | 2019 | 151.06665236899 | 2018 | 146.17296204954 | 2017 | 146.62928728969 | 2016 | 135.41735745077 | 2015 | 126.35240266948 | 2014 | 123.23636761212 | 2013 | 120.40152510765 | 2012 | 113.66755381768 | 2011 | 103.0801706924 | 2010 | 100 | 2009 | 100.24673598148 | 2008 | 88.757599224483 | 2007 | 76.887536846096 | 2006 | 70.486824248099 | 2005 | 64.73640194964 | 2004 | 59.383518622259 | 2003 | 52.902577158878 | 2002 | 49.234736895415 | 2001 | 48.272858944087 | 2000 | 46.711365689054 | 1999 | 44.958207007953 | 1998 | 46.066536598139 | 1997 | 43.37304161302 | 1996 | 38.720598143923 | 1995 | 36.048881527514 | 1993 | 18.120944187422 | 1992 | 16.128381264784 | 1991 | 14.72099364051 | 1990 | 12.304699413637 | 1989 | 11.810346225362 | 1988 | 11.692222247254 | 1987 | 11.354026275195 | 1986 | 10.903387638605 | 1985 | 11.026561673186 | 1984 | 10.835922039838 | 1983 | 10.283729923078 | 1982 | 9.6476595239109 | 1981 | 8.570734972677 | 1980 | 8.0513682232078 | 1979 | 7.5071457268894 | 1978 | 6.489953875348 | 1977 | 5.7296047416506 | 1976 | 5.0412189133166 | 1975 | 4.7041276411201 | 1974 | 3.6122786223217 | 1973 | 2.7556072050728 | 1972 | 2.519442844323 | 1971 | 2.4438735380803 | 1970 | 2.4319913131176 | 1969 | 2.4195334786158 | 1968 | 2.4078568284673 | 1967 | 2.334055465733 | 1966 | 2.3006289989305 |
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