| Year | Value | | 2022 | 1,122 | | 2021 | 1,164 | | 2020 | 1,199 | | 2019 | 1,226 | | 2018 | 1,245 | | 2017 | 1,263 | | 2016 | 1,277 | | 2015 | 1,270 | | 2014 | 1,243 | | 2013 | 1,209 | | 2012 | 1,169 | | 2011 | 1,125 | | 2010 | 1,082 | | 2009 | 1,029 | | 2008 | 970 | | 2007 | 923 | | 2006 | 879 | | 2005 | 835 | | 2004 | 791 | | 2003 | 751 | | 2002 | 710 | | 2001 | 666 | | 2000 | 604 | | 1999 | 560 | | 1998 | 546 | | 1997 | 529 | | 1996 | 511 | | 1995 | 492 | | 1994 | 472 | | 1993 | 450 | | 1992 | 426 | | 1991 | 401 | | 1990 | 380 | | 1989 | 361 | | 1988 | 340 | | 1987 | 322 | | 1986 | 305 | | 1985 | 287 | | 1984 | 271 | | 1983 | 258 | | 1982 | 248 | | 1981 | 242 | | 1980 | 238 | | 1979 | 167 | | 1978 | 78 | | 1977 | 62 | | 1976 | 71 | | 1975 | 82 | | 1974 | 91 | | 1973 | 100 | | 1972 | 110 | | 1971 | 120 | | 1970 | 130 | | 1969 | 136 | | 1968 | 139 | | 1967 | 141 | | 1966 | 143 | | 1965 | 143 | | 1964 | 145 | | 1963 | 148 | | 1962 | 150 | | 1961 | 152 | | 1960 | 155 |
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