| Year | Value | | 2022 | 9,902 | | 2021 | 9,951 | | 2020 | 9,972 | | 2019 | 9,983 | | 2018 | 9,961 | | 2017 | 9,919 | | 2016 | 9,900 | | 2015 | 9,945 | | 2014 | 10,054 | | 2013 | 10,092 | | 2012 | 10,099 | | 2011 | 10,047 | | 2010 | 9,924 | | 2009 | 9,786 | | 2008 | 9,656 | | 2007 | 9,495 | | 2006 | 9,343 | | 2005 | 9,204 | | 2004 | 9,061 | | 2003 | 8,890 | | 2002 | 8,654 | | 2001 | 8,368 | | 2000 | 8,058 | | 1999 | 7,729 | | 1998 | 7,396 | | 1997 | 7,064 | | 1996 | 6,731 | | 1995 | 6,412 | | 1994 | 6,096 | | 1993 | 5,791 | | 1992 | 5,534 | | 1991 | 5,316 | | 1990 | 5,125 | | 1989 | 4,999 | | 1988 | 4,931 | | 1987 | 4,868 | | 1986 | 4,799 | | 1985 | 4,719 | | 1984 | 4,621 | | 1983 | 4,501 | | 1982 | 4,364 | | 1981 | 4,231 | | 1980 | 4,130 | | 1979 | 4,068 | | 1978 | 4,023 | | 1977 | 3,962 | | 1976 | 3,886 | | 1975 | 3,819 | | 1974 | 3,747 | | 1973 | 3,654 | | 1972 | 3,552 | | 1971 | 3,383 | | 1970 | 3,144 | | 1969 | 2,903 | | 1968 | 2,766 | | 1967 | 2,680 | | 1966 | 2,596 | | 1965 | 2,512 | | 1964 | 2,443 | | 1963 | 2,373 | | 1962 | 2,306 | | 1961 | 2,241 | | 1960 | 2,178 |
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