| Year | Value | | 2022 | 7,477 | | 2021 | 7,370 | | 2020 | 7,253 | | 2019 | 7,121 | | 2018 | 7,008 | | 2017 | 6,922 | | 2016 | 6,844 | | 2015 | 6,758 | | 2014 | 6,660 | | 2013 | 6,539 | | 2012 | 6,404 | | 2011 | 6,270 | | 2010 | 6,146 | | 2009 | 6,031 | | 2008 | 5,920 | | 2007 | 5,813 | | 2006 | 5,714 | | 2005 | 5,624 | | 2004 | 5,540 | | 2003 | 5,460 | | 2002 | 5,384 | | 2001 | 5,311 | | 2000 | 5,242 | | 1999 | 5,177 | | 1998 | 5,115 | | 1997 | 5,053 | | 1996 | 4,991 | | 1995 | 4,928 | | 1994 | 4,867 | | 1993 | 4,811 | | 1992 | 4,757 | | 1991 | 4,704 | | 1990 | 4,652 | | 1989 | 4,601 | | 1988 | 4,549 | | 1987 | 4,496 | | 1986 | 4,444 | | 1985 | 4,392 | | 1984 | 4,339 | | 1983 | 4,286 | | 1982 | 4,231 | | 1981 | 4,176 | | 1980 | 4,122 | | 1979 | 4,069 | | 1978 | 4,018 | | 1977 | 3,969 | | 1976 | 3,921 | | 1975 | 3,874 | | 1974 | 3,826 | | 1973 | 3,778 | | 1972 | 3,727 | | 1971 | 3,675 | | 1970 | 3,620 | | 1969 | 3,565 | | 1968 | 3,510 | | 1967 | 3,458 | | 1966 | 3,408 | | 1965 | 3,357 | | 1964 | 3,307 | | 1963 | 3,258 | | 1962 | 3,209 | | 1961 | 3,157 | | 1960 | 3,105 |
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