Year | Value | 2022 | 496 | 2021 | 415 | 2020 | 409 | 2019 | 398 | 2018 | 390 | 2017 | 385 | 2016 | 381 | 2015 | 377 | 2014 | 370 | 2013 | 361 | 2012 | 347 | 2011 | 330 | 2010 | 324 | 2009 | 304 | 2008 | 293 | 2007 | 280 | 2006 | 269 | 2005 | 251 | 2004 | 239 | 2003 | 229 | 2002 | 220 | 2001 | 196 | 2000 | 173 | 1999 | 144 | 1998 | 111 | 1997 | 213 | 1996 | 325 | 1995 | 315 | 1994 | 324 | 1993 | 333 | 1992 | 332 | 1991 | 337 | 1990 | 343 | 1989 | 353 | 1988 | 360 | 1987 | 365 | 1986 | 347 | 1985 | 333 | 1984 | 315 | 1983 | 296 | 1982 | 275 | 1981 | 248 | 1980 | 215 | 1979 | 177 | 1978 | 139 | 1977 | 124 | 1976 | 125 | 1975 | 126 | 1974 | 130 | 1973 | 139 | 1972 | 152 | 1971 | 162 | 1970 | 156 | 1969 | 141 | 1968 | 124 | 1967 | 110 | 1966 | 100 | 1965 | 96 | 1964 | 97 | 1963 | 100 | 1962 | 106 | 1961 | 122 | 1960 | 140 |
|