| Year | Value | | 2022 | 4,109 | | 2021 | 4,366 | | 2020 | 4,463 | | 2019 | 4,373 | | 2018 | 4,249 | | 2017 | 4,141 | | 2016 | 4,043 | | 2015 | 3,950 | | 2014 | 3,868 | | 2013 | 3,799 | | 2012 | 3,739 | | 2011 | 3,685 | | 2010 | 3,631 | | 2009 | 3,572 | | 2008 | 3,507 | | 2007 | 3,435 | | 2006 | 3,361 | | 2005 | 3,289 | | 2004 | 3,214 | | 2003 | 3,146 | | 2002 | 3,097 | | 2001 | 3,048 | | 2000 | 2,995 | | 1999 | 2,942 | | 1998 | 2,892 | | 1997 | 2,846 | | 1996 | 2,801 | | 1995 | 2,755 | | 1994 | 2,708 | | 1993 | 2,658 | | 1992 | 2,606 | | 1991 | 2,552 | | 1990 | 2,502 | | 1989 | 2,455 | | 1988 | 2,416 | | 1987 | 2,382 | | 1986 | 2,345 | | 1985 | 2,305 | | 1984 | 2,259 | | 1983 | 2,207 | | 1982 | 2,151 | | 1981 | 2,094 | | 1980 | 2,034 | | 1979 | 1,970 | | 1978 | 1,904 | | 1977 | 1,839 | | 1976 | 1,782 | | 1975 | 1,736 | | 1974 | 1,700 | | 1973 | 1,677 | | 1972 | 1,666 | | 1971 | 1,655 | | 1970 | 1,636 | | 1969 | 1,610 | | 1968 | 1,569 | | 1967 | 1,518 | | 1966 | 1,473 | | 1965 | 1,438 | | 1964 | 1,412 | | 1963 | 1,398 | | 1962 | 1,393 | | 1961 | 1,386 | | 1960 | 1,365 |
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