| Year | Value | | 2022 | 4,978 | | 2021 | 4,784 | | 2020 | 4,574 | | 2019 | 4,350 | | 2018 | 4,185 | | 2017 | 4,151 | | 2016 | 4,270 | | 2015 | 4,481 | | 2014 | 4,653 | | 2013 | 4,713 | | 2012 | 4,616 | | 2011 | 4,382 | | 2010 | 4,075 | | 2009 | 3,774 | | 2008 | 3,567 | | 2007 | 3,510 | | 2006 | 3,589 | | 2005 | 3,740 | | 2004 | 3,859 | | 2003 | 3,899 | | 2002 | 3,734 | | 2001 | 3,408 | | 2000 | 3,165 | | 1999 | 3,065 | | 1998 | 3,025 | | 1997 | 2,972 | | 1996 | 2,920 | | 1995 | 2,868 | | 1994 | 2,815 | | 1993 | 2,765 | | 1992 | 2,726 | | 1991 | 2,672 | | 1990 | 2,609 | | 1989 | 2,576 | | 1988 | 2,555 | | 1987 | 2,532 | | 1986 | 2,506 | | 1985 | 2,474 | | 1984 | 2,434 | | 1983 | 2,384 | | 1982 | 2,324 | | 1981 | 2,277 | | 1980 | 2,240 | | 1979 | 2,160 | | 1978 | 2,038 | | 1977 | 1,906 | | 1976 | 1,778 | | 1975 | 1,657 | | 1974 | 1,548 | | 1973 | 1,451 | | 1972 | 1,369 | | 1971 | 1,301 | | 1970 | 1,238 | | 1969 | 1,183 | | 1968 | 1,138 | | 1967 | 1,108 | | 1966 | 1,085 | | 1965 | 1,056 | | 1964 | 1,030 | | 1963 | 1,002 | | 1962 | 973 | | 1961 | 947 | | 1960 | 922 |
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