| Year | Value | | 2022 | 3,538 | | 2021 | 3,440 | | 2020 | 3,318 | | 2019 | 3,207 | | 2018 | 3,105 | | 2017 | 2,987 | | 2016 | 2,858 | | 2015 | 2,720 | | 2014 | 2,565 | | 2013 | 2,408 | | 2012 | 2,278 | | 2011 | 2,188 | | 2010 | 2,107 | | 2009 | 2,010 | | 2008 | 1,911 | | 2007 | 1,815 | | 2006 | 1,713 | | 2005 | 1,626 | | 2004 | 1,550 | | 2003 | 1,467 | | 2002 | 1,387 | | 2001 | 1,313 | | 2000 | 1,234 | | 1999 | 1,166 | | 1998 | 1,116 | | 1997 | 1,070 | | 1996 | 1,032 | | 1995 | 1,010 | | 1994 | 1,001 | | 1993 | 997 | | 1992 | 991 | | 1991 | 983 | | 1990 | 1,004 | | 1989 | 1,061 | | 1988 | 1,123 | | 1987 | 1,185 | | 1986 | 1,238 | | 1985 | 1,278 | | 1984 | 1,312 | | 1983 | 1,323 | | 1982 | 1,314 | | 1981 | 1,308 | | 1980 | 1,300 | | 1979 | 1,291 | | 1978 | 1,283 | | 1977 | 1,278 | | 1976 | 1,275 | | 1975 | 1,272 | | 1974 | 1,263 | | 1973 | 1,250 | | 1972 | 1,232 | | 1971 | 1,211 | | 1970 | 1,192 | | 1969 | 1,169 | | 1968 | 1,146 | | 1967 | 1,133 | | 1966 | 1,128 | | 1965 | 1,123 | | 1964 | 1,116 | | 1963 | 1,108 | | 1962 | 1,096 | | 1961 | 1,082 | | 1960 | 1,070 |
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