| Year | Value | | 2022 | 3,116 | | 2021 | 3,128 | | 2020 | 3,176 | | 2019 | 3,259 | | 2018 | 3,362 | | 2017 | 3,464 | | 2016 | 3,544 | | 2015 | 3,591 | | 2014 | 3,600 | | 2013 | 3,571 | | 2012 | 3,515 | | 2011 | 3,426 | | 2010 | 3,306 | | 2009 | 3,164 | | 2008 | 3,007 | | 2007 | 2,840 | | 2006 | 2,683 | | 2005 | 2,536 | | 2004 | 2,396 | | 2003 | 2,263 | | 2002 | 2,120 | | 2001 | 1,979 | | 2000 | 1,851 | | 1999 | 1,727 | | 1998 | 1,621 | | 1997 | 1,536 | | 1996 | 1,477 | | 1995 | 1,438 | | 1994 | 1,407 | | 1993 | 1,377 | | 1992 | 1,342 | | 1991 | 1,299 | | 1990 | 1,277 | | 1989 | 1,285 | | 1988 | 1,302 | | 1987 | 1,320 | | 1986 | 1,335 | | 1985 | 1,350 | | 1984 | 1,364 | | 1983 | 1,384 | | 1982 | 1,403 | | 1981 | 1,413 | | 1980 | 1,424 | | 1979 | 1,433 | | 1978 | 1,424 | | 1977 | 1,403 | | 1976 | 1,373 | | 1975 | 1,340 | | 1974 | 1,320 | | 1973 | 1,315 | | 1972 | 1,319 | | 1971 | 1,329 | | 1970 | 1,335 | | 1969 | 1,335 | | 1968 | 1,334 | | 1967 | 1,336 | | 1966 | 1,346 | | 1965 | 1,365 | | 1964 | 1,387 | | 1963 | 1,408 | | 1962 | 1,418 | | 1961 | 1,415 | | 1960 | 1,392 |
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