| Year | Value | | 2022 | 6,383 | | 2021 | 6,296 | | 2020 | 6,215 | | 2019 | 6,148 | | 2018 | 6,097 | | 2017 | 6,050 | | 2016 | 5,987 | | 2015 | 5,910 | | 2014 | 5,823 | | 2013 | 5,713 | | 2012 | 5,585 | | 2011 | 5,452 | | 2010 | 5,316 | | 2009 | 5,142 | | 2008 | 4,933 | | 2007 | 4,721 | | 2006 | 4,509 | | 2005 | 4,297 | | 2004 | 4,081 | | 2003 | 3,866 | | 2002 | 3,651 | | 2001 | 3,430 | | 2000 | 3,206 | | 1999 | 2,999 | | 1998 | 2,816 | | 1997 | 2,642 | | 1996 | 2,482 | | 1995 | 2,349 | | 1994 | 2,241 | | 1993 | 2,153 | | 1992 | 2,092 | | 1991 | 2,053 | | 1990 | 2,024 | | 1989 | 2,002 | | 1988 | 1,978 | | 1987 | 1,951 | | 1986 | 1,918 | | 1985 | 1,878 | | 1984 | 1,837 | | 1983 | 1,801 | | 1982 | 1,778 | | 1981 | 1,766 | | 1980 | 1,764 | | 1979 | 1,916 | | 1978 | 2,077 | | 1977 | 2,031 | | 1976 | 1,915 | | 1975 | 1,798 | | 1974 | 1,683 | | 1973 | 1,574 | | 1972 | 1,475 | | 1971 | 1,387 | | 1970 | 1,311 | | 1969 | 1,244 | | 1968 | 1,188 | | 1967 | 1,143 | | 1966 | 1,103 | | 1965 | 1,065 | | 1964 | 1,028 | | 1963 | 990 | | 1962 | 951 | | 1961 | 911 | | 1960 | 869 |
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