| Year | Value | | 2022 | 9,832 | | 2021 | 9,964 | | 2020 | 10,118 | | 2019 | 10,264 | | 2018 | 10,390 | | 2017 | 10,503 | | 2016 | 10,602 | | 2015 | 10,665 | | 2014 | 10,682 | | 2013 | 10,646 | | 2012 | 10,553 | | 2011 | 10,404 | | 2010 | 10,187 | | 2009 | 9,908 | | 2008 | 9,610 | | 2007 | 9,269 | | 2006 | 8,894 | | 2005 | 8,532 | | 2004 | 8,171 | | 2003 | 7,805 | | 2002 | 7,431 | | 2001 | 7,062 | | 2000 | 6,716 | | 1999 | 6,418 | | 1998 | 6,182 | | 1997 | 5,993 | | 1996 | 5,863 | | 1995 | 5,789 | | 1994 | 5,718 | | 1993 | 5,620 | | 1992 | 5,499 | | 1991 | 5,350 | | 1990 | 5,172 | | 1989 | 4,988 | | 1988 | 4,820 | | 1987 | 4,681 | | 1986 | 4,563 | | 1985 | 4,454 | | 1984 | 4,343 | | 1983 | 4,199 | | 1982 | 4,023 | | 1981 | 3,837 | | 1980 | 3,641 | | 1979 | 3,442 | | 1978 | 3,251 | | 1977 | 3,077 | | 1976 | 2,929 | | 1975 | 2,809 | | 1974 | 2,705 | | 1973 | 2,607 | | 1972 | 2,503 | | 1971 | 2,376 | | 1970 | 2,233 | | 1969 | 2,090 | | 1968 | 1,964 | | 1967 | 1,872 | | 1966 | 1,825 | | 1965 | 1,819 | | 1964 | 1,843 | | 1963 | 1,879 | | 1962 | 1,909 | | 1961 | 1,914 | | 1960 | 1,888 |
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