| Year | Value | | 2022 | 6,417 | | 2021 | 6,173 | | 2020 | 5,992 | | 2019 | 5,873 | | 2018 | 5,811 | | 2017 | 5,780 | | 2016 | 5,721 | | 2015 | 5,608 | | 2014 | 5,474 | | 2013 | 5,338 | | 2012 | 5,210 | | 2011 | 5,094 | | 2010 | 4,985 | | 2009 | 4,869 | | 2008 | 4,742 | | 2007 | 4,603 | | 2006 | 4,454 | | 2005 | 4,295 | | 2004 | 4,119 | | 2003 | 3,924 | | 2002 | 3,713 | | 2001 | 3,492 | | 2000 | 3,268 | | 1999 | 3,045 | | 1998 | 2,868 | | 1997 | 2,745 | | 1996 | 2,631 | | 1995 | 2,523 | | 1994 | 2,436 | | 1993 | 2,380 | | 1992 | 2,437 | | 1991 | 2,482 | | 1990 | 2,395 | | 1989 | 2,294 | | 1988 | 2,196 | | 1987 | 2,103 | | 1986 | 2,012 | | 1985 | 1,929 | | 1984 | 1,849 | | 1983 | 1,770 | | 1982 | 1,696 | | 1981 | 1,627 | | 1980 | 1,560 | | 1979 | 1,497 | | 1978 | 1,437 | | 1977 | 1,380 | | 1976 | 1,325 | | 1975 | 1,272 | | 1974 | 1,222 | | 1973 | 1,175 | | 1972 | 1,133 | | 1971 | 1,095 | | 1970 | 1,059 | | 1969 | 1,027 | | 1968 | 997 | | 1967 | 968 | | 1966 | 942 | | 1965 | 918 | | 1964 | 893 | | 1963 | 869 | | 1962 | 845 | | 1961 | 822 | | 1960 | 802 |
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