| Year | Value | | 2022 | 9,335 | | 2021 | 8,900 | | 2020 | 8,436 | | 2019 | 7,969 | | 2018 | 7,513 | | 2017 | 7,061 | | 2016 | 6,604 | | 2015 | 6,142 | | 2014 | 5,679 | | 2013 | 5,233 | | 2012 | 4,803 | | 2011 | 4,380 | | 2010 | 3,994 | | 2009 | 3,651 | | 2008 | 3,348 | | 2007 | 3,127 | | 2006 | 3,003 | | 2005 | 2,956 | | 2004 | 2,945 | | 2003 | 2,919 | | 2002 | 2,847 | | 2001 | 2,742 | | 2000 | 2,624 | | 1999 | 2,519 | | 1998 | 2,438 | | 1997 | 2,374 | | 1996 | 2,314 | | 1995 | 2,244 | | 1994 | 2,146 | | 1993 | 2,016 | | 1992 | 1,866 | | 1991 | 1,724 | | 1990 | 1,617 | | 1989 | 1,544 | | 1988 | 1,491 | | 1987 | 1,444 | | 1986 | 1,399 | | 1985 | 1,351 | | 1984 | 1,305 | | 1983 | 1,260 | | 1982 | 1,217 | | 1981 | 1,176 | | 1980 | 1,134 | | 1979 | 1,095 | | 1978 | 1,068 | | 1977 | 1,054 | | 1976 | 1,050 | | 1975 | 1,062 | | 1974 | 1,084 | | 1973 | 1,109 | | 1972 | 1,120 | | 1971 | 1,095 | | 1970 | 1,024 | | 1969 | 934 | | 1968 | 854 | | 1967 | 797 | | 1966 | 773 | | 1965 | 777 | | 1964 | 802 | | 1963 | 841 | | 1962 | 883 | | 1961 | 922 | | 1960 | 944 |
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