| Year | Value | | 2022 | 3,751 | | 2021 | 3,773 | | 2020 | 3,762 | | 2019 | 3,734 | | 2018 | 3,680 | | 2017 | 3,607 | | 2016 | 3,508 | | 2015 | 3,388 | | 2014 | 3,277 | | 2013 | 3,176 | | 2012 | 3,058 | | 2011 | 2,927 | | 2010 | 2,786 | | 2009 | 2,625 | | 2008 | 2,459 | | 2007 | 2,323 | | 2006 | 2,229 | | 2005 | 2,145 | | 2004 | 2,048 | | 2003 | 1,953 | | 2002 | 1,861 | | 2001 | 1,758 | | 2000 | 1,669 | | 1999 | 1,588 | | 1998 | 1,498 | | 1997 | 1,414 | | 1996 | 1,332 | | 1995 | 1,248 | | 1994 | 1,173 | | 1993 | 1,113 | | 1992 | 1,063 | | 1991 | 1,032 | | 1990 | 1,042 | | 1989 | 1,083 | | 1988 | 1,135 | | 1987 | 1,188 | | 1986 | 1,245 | | 1985 | 1,307 | | 1984 | 1,373 | | 1983 | 1,408 | | 1982 | 1,411 | | 1981 | 1,409 | | 1980 | 1,402 | | 1979 | 1,396 | | 1978 | 1,388 | | 1977 | 1,379 | | 1976 | 1,373 | | 1975 | 1,368 | | 1974 | 1,363 | | 1973 | 1,361 | | 1972 | 1,360 | | 1971 | 1,358 | | 1970 | 1,353 | | 1969 | 1,337 | | 1968 | 1,309 | | 1967 | 1,270 | | 1966 | 1,229 | | 1965 | 1,193 | | 1964 | 1,169 | | 1963 | 1,165 | | 1962 | 1,181 | | 1961 | 1,197 | | 1960 | 1,203 |
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