| Year | Value | | 2022 | 3,658 | | 2021 | 3,524 | | 2020 | 3,390 | | 2019 | 3,290 | | 2018 | 3,232 | | 2017 | 3,201 | | 2016 | 3,186 | | 2015 | 3,161 | | 2014 | 3,101 | | 2013 | 3,000 | | 2012 | 2,876 | | 2011 | 2,731 | | 2010 | 2,579 | | 2009 | 2,447 | | 2008 | 2,339 | | 2007 | 2,240 | | 2006 | 2,144 | | 2005 | 2,053 | | 2004 | 1,953 | | 2003 | 1,855 | | 2002 | 1,766 | | 2001 | 1,686 | | 2000 | 1,623 | | 1999 | 1,589 | | 1998 | 1,578 | | 1997 | 1,583 | | 1996 | 1,598 | | 1995 | 1,619 | | 1994 | 1,644 | | 1993 | 1,670 | | 1992 | 1,693 | | 1991 | 1,712 | | 1990 | 1,727 | | 1989 | 1,738 | | 1988 | 1,744 | | 1987 | 1,743 | | 1986 | 1,739 | | 1985 | 1,734 | | 1984 | 1,723 | | 1983 | 1,710 | | 1982 | 1,694 | | 1981 | 1,647 | | 1980 | 1,582 | | 1979 | 1,536 | | 1978 | 1,501 | | 1977 | 1,474 | | 1976 | 1,445 | | 1975 | 1,410 | | 1974 | 1,369 | | 1973 | 1,325 | | 1972 | 1,281 | | 1971 | 1,239 | | 1970 | 1,212 | | 1969 | 1,198 | | 1968 | 1,185 | | 1967 | 1,174 | | 1966 | 1,164 | | 1965 | 1,154 | | 1964 | 1,144 | | 1963 | 1,132 | | 1962 | 1,111 | | 1961 | 1,084 | | 1960 | 1,058 |
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