| Year | Value | | 2022 | 9,391 | | 2021 | 8,936 | | 2020 | 8,598 | | 2019 | 8,309 | | 2018 | 8,069 | | 2017 | 7,837 | | 2016 | 7,539 | | 2015 | 7,254 | | 2014 | 7,001 | | 2013 | 6,691 | | 2012 | 6,407 | | 2011 | 6,151 | | 2010 | 5,833 | | 2009 | 5,507 | | 2008 | 5,193 | | 2007 | 4,912 | | 2006 | 4,776 | | 2005 | 4,743 | | 2004 | 4,758 | | 2003 | 4,811 | | 2002 | 4,864 | | 2001 | 4,897 | | 2000 | 4,969 | | 1999 | 5,049 | | 1998 | 5,066 | | 1997 | 5,044 | | 1996 | 5,012 | | 1995 | 4,882 | | 1994 | 4,698 | | 1993 | 4,633 | | 1992 | 4,603 | | 1991 | 4,549 | | 1990 | 4,516 | | 1989 | 4,464 | | 1988 | 4,353 | | 1987 | 4,241 | | 1986 | 4,118 | | 1985 | 3,991 | | 1984 | 3,939 | | 1983 | 3,907 | | 1982 | 3,848 | | 1981 | 3,823 | | 1980 | 3,774 | | 1979 | 3,685 | | 1978 | 3,625 | | 1977 | 3,545 | | 1976 | 3,435 | | 1975 | 3,387 | | 1974 | 3,377 | | 1973 | 3,331 | | 1972 | 3,255 | | 1971 | 3,167 | | 1970 | 3,117 | | 1969 | 3,085 | | 1968 | 3,029 | | 1967 | 3,001 | | 1966 | 3,016 | | 1965 | 3,040 | | 1964 | 3,019 | | 1963 | 2,980 | | 1962 | 2,968 | | 1961 | 2,957 | | 1960 | 2,862 |
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