Year | Value | 2022 | 529 | 2021 | 510 | 2020 | 497 | 2019 | 485 | 2018 | 472 | 2017 | 452 | 2016 | 427 | 2015 | 402 | 2014 | 387 | 2013 | 382 | 2012 | 387 | 2011 | 399 | 2010 | 406 | 2009 | 406 | 2008 | 408 | 2007 | 409 | 2006 | 406 | 2005 | 396 | 2004 | 380 | 2003 | 359 | 2002 | 336 | 2001 | 311 | 2000 | 288 | 1999 | 276 | 1998 | 268 | 1997 | 267 | 1996 | 271 | 1995 | 275 | 1994 | 279 | 1993 | 280 | 1992 | 277 | 1991 | 267 | 1990 | 262 | 1989 | 256 | 1988 | 249 | 1987 | 246 | 1986 | 244 | 1985 | 241 | 1984 | 236 | 1983 | 229 | 1982 | 224 | 1981 | 222 | 1980 | 218 | 1979 | 215 | 1978 | 230 | 1977 | 256 | 1976 | 262 | 1975 | 247 | 1974 | 218 | 1973 | 199 | 1972 | 203 | 1971 | 223 | 1970 | 246 | 1969 | 263 | 1968 | 265 | 1967 | 255 | 1966 | 243 | 1965 | 239 | 1964 | 242 | 1963 | 245 | 1962 | 249 | 1961 | 252 | 1960 | 255 |
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