Year | Value | 2022 | 477 | 2021 | 456 | 2020 | 436 | 2019 | 416 | 2018 | 396 | 2017 | 378 | 2016 | 362 | 2015 | 346 | 2014 | 331 | 2013 | 317 | 2012 | 303 | 2011 | 292 | 2010 | 286 | 2009 | 293 | 2008 | 307 | 2007 | 312 | 2006 | 314 | 2005 | 313 | 2004 | 307 | 2003 | 299 | 2002 | 292 | 2001 | 283 | 2000 | 277 | 1999 | 285 | 1998 | 303 | 1997 | 321 | 1996 | 339 | 1995 | 361 | 1994 | 363 | 1993 | 333 | 1992 | 291 | 1991 | 264 | 1990 | 256 | 1989 | 246 | 1988 | 237 | 1987 | 229 | 1986 | 221 | 1985 | 215 | 1984 | 207 | 1983 | 198 | 1982 | 188 | 1981 | 177 | 1980 | 170 | 1979 | 162 | 1978 | 153 | 1977 | 149 | 1976 | 149 | 1975 | 150 | 1974 | 147 | 1973 | 143 | 1972 | 140 | 1971 | 135 | 1970 | 131 | 1969 | 127 | 1968 | 123 | 1967 | 120 | 1966 | 116 | 1965 | 112 | 1964 | 109 | 1963 | 106 | 1962 | 101 | 1961 | 98 | 1960 | 98 |
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