| Year | Value | | 2022 | 12,621 | | 2021 | 12,494 | | 2020 | 12,288 | | 2019 | 11,982 | | 2018 | 11,575 | | 2017 | 11,125 | | 2016 | 10,663 | | 2015 | 10,170 | | 2014 | 9,666 | | 2013 | 9,217 | | 2012 | 8,810 | | 2011 | 8,413 | | 2010 | 8,050 | | 2009 | 7,722 | | 2008 | 7,440 | | 2007 | 7,197 | | 2006 | 6,967 | | 2005 | 6,738 | | 2004 | 6,505 | | 2003 | 6,269 | | 2002 | 6,024 | | 2001 | 5,772 | | 2000 | 5,539 | | 1999 | 5,343 | | 1998 | 5,188 | | 1997 | 5,087 | | 1996 | 5,040 | | 1995 | 5,019 | | 1994 | 4,998 | | 1993 | 4,968 | | 1992 | 4,920 | | 1991 | 4,873 | | 1990 | 4,842 | | 1989 | 4,829 | | 1988 | 4,820 | | 1987 | 4,806 | | 1986 | 4,787 | | 1985 | 4,746 | | 1984 | 4,677 | | 1983 | 4,591 | | 1982 | 4,493 | | 1981 | 4,382 | | 1980 | 4,271 | | 1979 | 4,160 | | 1978 | 4,046 | | 1977 | 3,935 | | 1976 | 3,827 | | 1975 | 3,722 | | 1974 | 3,622 | | 1973 | 3,522 | | 1972 | 3,417 | | 1971 | 3,305 | | 1970 | 3,187 | | 1969 | 3,068 | | 1968 | 2,952 | | 1967 | 2,846 | | 1966 | 2,759 | | 1965 | 2,692 | | 1964 | 2,641 | | 1963 | 2,599 | | 1962 | 2,563 | | 1961 | 2,530 | | 1960 | 2,495 |
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