Year | Value | 2022 | 4,765 | 2021 | 4,036 | 2020 | 4,069 | 2019 | 4,068 | 2018 | 4,046 | 2017 | 4,034 | 2016 | 4,024 | 2015 | 3,992 | 2014 | 3,949 | 2013 | 3,963 | 2012 | 3,921 | 2011 | 3,867 | 2010 | 3,982 | 2009 | 3,871 | 2008 | 3,807 | 2007 | 3,691 | 2006 | 3,657 | 2005 | 3,573 | 2004 | 3,567 | 2003 | 3,606 | 2002 | 3,681 | 2001 | 3,686 | 2000 | 3,847 | 1999 | 3,978 | 1998 | 4,077 | 1997 | 4,037 | 1996 | 4,003 | 1995 | 4,027 | 1994 | 3,995 | 1993 | 3,911 | 1992 | 3,886 | 1991 | 3,928 | 1990 | 3,940 | 1989 | 4,003 | 1988 | 4,053 | 1987 | 4,058 | 1986 | 3,916 | 1985 | 3,985 | 1984 | 4,038 | 1983 | 4,101 | 1982 | 4,196 | 1981 | 4,198 | 1980 | 4,174 | 1979 | 4,206 | 1978 | 4,229 | 1977 | 4,292 | 1976 | 4,324 | 1975 | 4,304 | 1974 | 4,242 | 1973 | 4,227 | 1972 | 4,257 | 1971 | 4,275 | 1970 | 4,306 | 1969 | 4,300 | 1968 | 4,260 | 1967 | 4,196 | 1966 | 4,111 | 1965 | 4,020 | 1964 | 3,940 | 1963 | 3,858 | 1962 | 3,765 | 1961 | 3,666 | 1960 | 3,534 |
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