| Year | Value | | 2022 | 2,068 | | 2021 | 2,085 | | 2020 | 2,098 | | 2019 | 2,092 | | 2018 | 2,069 | | 2017 | 2,028 | | 2016 | 1,968 | | 2015 | 1,891 | | 2014 | 1,797 | | 2013 | 1,697 | | 2012 | 1,597 | | 2011 | 1,488 | | 2010 | 1,380 | | 2009 | 1,279 | | 2008 | 1,186 | | 2007 | 1,106 | | 2006 | 1,032 | | 2005 | 955 | | 2004 | 878 | | 2003 | 803 | | 2002 | 728 | | 2001 | 661 | | 2000 | 608 | | 1999 | 566 | | 1998 | 531 | | 1997 | 498 | | 1996 | 469 | | 1995 | 446 | | 1994 | 428 | | 1993 | 409 | | 1992 | 381 | | 1991 | 350 | | 1990 | 320 | | 1989 | 306 | | 1988 | 305 | | 1987 | 299 | | 1986 | 283 | | 1985 | 264 | | 1984 | 256 | | 1983 | 260 | | 1982 | 257 | | 1981 | 248 | | 1980 | 234 | | 1979 | 221 | | 1978 | 212 | | 1977 | 203 | | 1976 | 191 | | 1975 | 179 | | 1974 | 169 | | 1973 | 158 | | 1972 | 146 | | 1971 | 135 | | 1970 | 124 | | 1969 | 112 | | 1968 | 100 | | 1967 | 102 | | 1966 | 129 | | 1965 | 161 | | 1964 | 174 | | 1963 | 172 | | 1962 | 170 | | 1961 | 168 | | 1960 | 164 |
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