| Year | Value | | 2022 | 4,705 | | 2021 | 4,748 | | 2020 | 4,843 | | 2019 | 4,757 | | 2018 | 4,628 | | 2017 | 4,499 | | 2016 | 4,374 | | 2015 | 4,253 | | 2014 | 4,136 | | 2013 | 4,018 | | 2012 | 3,901 | | 2011 | 3,794 | | 2010 | 3,702 | | 2009 | 3,623 | | 2008 | 3,557 | | 2007 | 3,494 | | 2006 | 3,415 | | 2005 | 3,308 | | 2004 | 3,176 | | 2003 | 3,016 | | 2002 | 2,833 | | 2001 | 2,648 | | 2000 | 2,479 | | 1999 | 2,322 | | 1998 | 2,174 | | 1997 | 2,038 | | 1996 | 1,912 | | 1995 | 1,791 | | 1994 | 1,681 | | 1993 | 1,587 | | 1992 | 1,512 | | 1991 | 1,450 | | 1990 | 1,398 | | 1989 | 1,357 | | 1988 | 1,331 | | 1987 | 1,319 | | 1986 | 1,311 | | 1985 | 1,296 | | 1984 | 1,266 | | 1983 | 1,224 | | 1982 | 1,172 | | 1981 | 1,122 | | 1980 | 1,087 | | 1979 | 1,066 | | 1978 | 1,062 | | 1977 | 1,075 | | 1976 | 1,091 | | 1975 | 1,101 | | 1974 | 1,101 | | 1973 | 1,090 | | 1972 | 1,073 | | 1971 | 1,052 | | 1970 | 1,031 | | 1969 | 1,011 | | 1968 | 987 | | 1967 | 961 | | 1966 | 934 | | 1965 | 908 | | 1964 | 883 | | 1963 | 858 | | 1962 | 834 | | 1961 | 812 | | 1960 | 787 |
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