Year | Value | 2021 | 99.4 | 2020 | 99.4 | 2019 | 99.4 | 2018 | 99.4 | 2017 | 99.4 | 2016 | 99.4 | 2015 | 99.4 | 2014 | 99.4 | 2013 | 99.4 | 2012 | 99.4 | 2011 | 99.4 | 2010 | 99.4 | 2009 | 99.4 | 2008 | 99.4 | 2007 | 99.3 | 2006 | 101 | 2005 | 109 | 2004 | 111 | 2003 | 124 | 2002 | 131 | 2001 | 139 | 2000 | 142 | 1999 | 154 | 1998 | 155 | 1997 | 170 | 1996 | 174 | 1995 | 180 | 1994 | 195 | 1993 | 197 | 1992 | 197 | 1991 | 198 | 1990 | 209 | 1989 | 210 | 1988 | 210 | 1987 | 210 | 1986 | 212 | 1985 | 218 | 1984 | 215 | 1983 | 212 | 1982 | 210 | 1981 | 208 | 1980 | 205 | 1979 | 202 | 1978 | 200 | 1977 | 200 | 1976 | 200 | 1975 | 200 | 1974 | 199 | 1973 | 200 | 1972 | 200 | 1971 | 200 | 1970 | 190 | 1969 | 190 | 1968 | 190 | 1967 | 190 | 1966 | 180 | 1965 | 180 | 1964 | 180 | 1963 | 180 | 1962 | 170 | 1961 | 170 |
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