| Year | Value | | 2022 | 3,749 | | 2021 | 3,783 | | 2020 | 3,802 | | 2019 | 3,749 | | 2018 | 3,607 | | 2017 | 3,423 | | 2016 | 3,234 | | 2015 | 3,048 | | 2014 | 2,905 | | 2013 | 2,806 | | 2012 | 2,739 | | 2011 | 2,660 | | 2010 | 2,555 | | 2009 | 2,425 | | 2008 | 2,287 | | 2007 | 2,151 | | 2006 | 2,026 | | 2005 | 1,909 | | 2004 | 1,811 | | 2003 | 1,729 | | 2002 | 1,648 | | 2001 | 1,566 | | 2000 | 1,485 | | 1999 | 1,406 | | 1998 | 1,331 | | 1997 | 1,260 | | 1996 | 1,193 | | 1995 | 1,130 | | 1994 | 1,074 | | 1993 | 1,030 | | 1992 | 1,007 | | 1991 | 1,002 | | 1990 | 1,009 | | 1989 | 1,010 | | 1988 | 1,000 | | 1987 | 987 | | 1986 | 965 | | 1985 | 931 | | 1984 | 890 | | 1983 | 843 | | 1982 | 790 | | 1981 | 735 | | 1980 | 690 | | 1979 | 659 | | 1978 | 638 | | 1977 | 623 | | 1976 | 613 | | 1975 | 608 | | 1974 | 599 | | 1973 | 579 | | 1972 | 554 | | 1971 | 518 | | 1970 | 472 | | 1969 | 432 | | 1968 | 408 | | 1967 | 389 | | 1966 | 371 | | 1965 | 351 | | 1964 | 337 | | 1963 | 328 | | 1962 | 320 | | 1961 | 318 | | 1960 | 326 |
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