| Year | Value | | 2022 | 5,203 | | 2021 | 5,063 | | 2020 | 4,876 | | 2019 | 4,692 | | 2018 | 4,533 | | 2017 | 4,415 | | 2016 | 4,357 | | 2015 | 4,353 | | 2014 | 4,372 | | 2013 | 4,390 | | 2012 | 4,386 | | 2011 | 4,354 | | 2010 | 4,297 | | 2009 | 4,213 | | 2008 | 4,119 | | 2007 | 4,029 | | 2006 | 3,930 | | 2005 | 3,816 | | 2004 | 3,704 | | 2003 | 3,584 | | 2002 | 3,454 | | 2001 | 3,325 | | 2000 | 3,201 | | 1999 | 3,082 | | 1998 | 2,975 | | 1997 | 2,880 | | 1996 | 2,807 | | 1995 | 2,758 | | 1994 | 2,724 | | 1993 | 2,705 | | 1992 | 2,700 | | 1991 | 2,711 | | 1990 | 2,740 | | 1989 | 2,765 | | 1988 | 2,767 | | 1987 | 2,752 | | 1986 | 2,745 | | 1985 | 2,749 | | 1984 | 2,742 | | 1983 | 2,717 | | 1982 | 2,688 | | 1981 | 2,680 | | 1980 | 2,694 | | 1979 | 2,712 | | 1978 | 2,723 | | 1977 | 2,721 | | 1976 | 2,701 | | 1975 | 2,637 | | 1974 | 2,510 | | 1973 | 2,363 | | 1972 | 2,234 | | 1971 | 2,121 | | 1970 | 2,034 | | 1969 | 1,971 | | 1968 | 1,923 | | 1967 | 1,884 | | 1966 | 1,846 | | 1965 | 1,803 | | 1964 | 1,759 | | 1963 | 1,713 | | 1962 | 1,660 | | 1961 | 1,611 | | 1960 | 1,566 |
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