| Year | Value | | 2022 | 4,616 | | 2021 | 4,425 | | 2020 | 4,224 | | 2019 | 4,013 | | 2018 | 3,806 | | 2017 | 3,614 | | 2016 | 3,439 | | 2015 | 3,290 | | 2014 | 3,174 | | 2013 | 3,082 | | 2012 | 3,003 | | 2011 | 2,939 | | 2010 | 2,887 | | 2009 | 2,817 | | 2008 | 2,722 | | 2007 | 2,613 | | 2006 | 2,504 | | 2005 | 2,402 | | 2004 | 2,300 | | 2003 | 2,213 | | 2002 | 2,159 | | 2001 | 2,123 | | 2000 | 2,096 | | 1999 | 2,086 | | 1998 | 2,085 | | 1997 | 2,071 | | 1996 | 2,033 | | 1995 | 1,980 | | 1994 | 1,919 | | 1993 | 1,853 | | 1992 | 1,790 | | 1991 | 1,764 | | 1990 | 1,768 | | 1989 | 1,770 | | 1988 | 1,766 | | 1987 | 1,756 | | 1986 | 1,743 | | 1985 | 1,724 | | 1984 | 1,697 | | 1983 | 1,666 | | 1982 | 1,630 | | 1981 | 1,591 | | 1980 | 1,560 | | 1979 | 1,536 | | 1978 | 1,512 | | 1977 | 1,485 | | 1976 | 1,458 | | 1975 | 1,431 | | 1974 | 1,410 | | 1973 | 1,390 | | 1972 | 1,372 | | 1971 | 1,356 | | 1970 | 1,338 | | 1969 | 1,319 | | 1968 | 1,299 | | 1967 | 1,278 | | 1966 | 1,259 | | 1965 | 1,239 | | 1964 | 1,225 | | 1963 | 1,215 | | 1962 | 1,204 | | 1961 | 1,194 | | 1960 | 1,187 |
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