| Year | Value | | 2022 | 5,289 | | 2021 | 5,027 | | 2020 | 4,735 | | 2019 | 4,440 | | 2018 | 4,161 | | 2017 | 3,919 | | 2016 | 3,740 | | 2015 | 3,626 | | 2014 | 3,568 | | 2013 | 3,551 | | 2012 | 3,550 | | 2011 | 3,546 | | 2010 | 3,521 | | 2009 | 3,481 | | 2008 | 3,445 | | 2007 | 3,422 | | 2006 | 3,435 | | 2005 | 3,487 | | 2004 | 3,572 | | 2003 | 3,675 | | 2002 | 3,782 | | 2001 | 3,861 | | 2000 | 3,916 | | 1999 | 3,944 | | 1998 | 3,926 | | 1997 | 3,871 | | 1996 | 3,776 | | 1995 | 3,649 | | 1994 | 3,501 | | 1993 | 3,335 | | 1992 | 3,158 | | 1991 | 2,979 | | 1990 | 2,803 | | 1989 | 2,633 | | 1988 | 2,478 | | 1987 | 2,340 | | 1986 | 2,213 | | 1985 | 2,091 | | 1984 | 1,977 | | 1983 | 1,876 | | 1982 | 1,783 | | 1981 | 1,703 | | 1980 | 1,648 | | 1979 | 1,614 | | 1978 | 1,591 | | 1977 | 1,579 | | 1976 | 1,575 | | 1975 | 1,575 | | 1974 | 1,576 | | 1973 | 1,576 | | 1972 | 1,572 | | 1971 | 1,573 | | 1970 | 1,594 | | 1969 | 1,652 | | 1968 | 1,728 | | 1967 | 1,788 | | 1966 | 1,823 | | 1965 | 1,830 | | 1964 | 1,814 | | 1963 | 1,782 | | 1962 | 1,744 | | 1961 | 1,706 | | 1960 | 1,674 |
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