| Year | Value | | 2022 | 12,058 | | 2021 | 11,855 | | 2020 | 11,609 | | 2019 | 11,312 | | 2018 | 11,040 | | 2017 | 10,772 | | 2016 | 10,478 | | 2015 | 10,205 | | 2014 | 9,960 | | 2013 | 9,751 | | 2012 | 9,572 | | 2011 | 9,411 | | 2010 | 9,263 | | 2009 | 9,118 | | 2008 | 8,965 | | 2007 | 8,802 | | 2006 | 8,647 | | 2005 | 8,513 | | 2004 | 8,394 | | 2003 | 8,282 | | 2002 | 8,176 | | 2001 | 8,076 | | 2000 | 7,981 | | 1999 | 7,888 | | 1998 | 7,795 | | 1997 | 7,707 | | 1996 | 7,625 | | 1995 | 7,542 | | 1994 | 7,462 | | 1993 | 7,384 | | 1992 | 7,305 | | 1991 | 7,230 | | 1990 | 7,157 | | 1989 | 7,086 | | 1988 | 7,017 | | 1987 | 6,951 | | 1986 | 6,886 | | 1985 | 6,822 | | 1984 | 6,759 | | 1983 | 6,695 | | 1982 | 6,631 | | 1981 | 6,569 | | 1980 | 6,506 | | 1979 | 6,440 | | 1978 | 6,373 | | 1977 | 6,304 | | 1976 | 6,235 | | 1975 | 6,171 | | 1974 | 6,108 | | 1973 | 6,048 | | 1972 | 5,987 | | 1971 | 5,924 | | 1970 | 5,859 | | 1969 | 5,792 | | 1968 | 5,728 | | 1967 | 5,666 | | 1966 | 5,603 | | 1965 | 5,538 | | 1964 | 5,474 | | 1963 | 5,411 | | 1962 | 5,346 | | 1961 | 5,281 | | 1960 | 5,218 |
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