| Year | Value | | 2022 | 8,957 | | 2021 | 8,890 | | 2020 | 8,773 | | 2019 | 8,613 | | 2018 | 8,495 | | 2017 | 8,409 | | 2016 | 8,288 | | 2015 | 8,149 | | 2014 | 7,978 | | 2013 | 7,683 | | 2012 | 7,352 | | 2011 | 7,024 | | 2010 | 6,731 | | 2009 | 6,482 | | 2008 | 6,254 | | 2007 | 6,053 | | 2006 | 5,912 | | 2005 | 5,807 | | 2004 | 5,726 | | 2003 | 5,651 | | 2002 | 5,542 | | 2001 | 5,389 | | 2000 | 5,204 | | 1999 | 5,005 | | 1998 | 4,810 | | 1997 | 4,629 | | 1996 | 4,485 | | 1995 | 4,385 | | 1994 | 4,276 | | 1993 | 4,139 | | 1992 | 3,991 | | 1991 | 3,833 | | 1990 | 3,661 | | 1989 | 3,523 | | 1988 | 3,426 | | 1987 | 3,321 | | 1986 | 3,218 | | 1985 | 3,123 | | 1984 | 3,027 | | 1983 | 2,930 | | 1982 | 2,841 | | 1981 | 2,754 | | 1980 | 2,670 | | 1979 | 2,598 | | 1978 | 2,535 | | 1977 | 2,463 | | 1976 | 2,375 | | 1975 | 2,313 | | 1974 | 2,287 | | 1973 | 2,270 | | 1972 | 2,268 | | 1971 | 2,243 | | 1970 | 2,186 | | 1969 | 2,120 | | 1968 | 2,098 | | 1967 | 2,085 | | 1966 | 2,059 | | 1965 | 2,022 | | 1964 | 1,987 | | 1963 | 1,944 | | 1962 | 1,898 | | 1961 | 1,852 | | 1960 | 1,798 |
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