| Year | Value | | 2022 | 4,013 | | 2021 | 3,866 | | 2020 | 3,703 | | 2019 | 3,537 | | 2018 | 3,375 | | 2017 | 3,238 | | 2016 | 3,123 | | 2015 | 3,025 | | 2014 | 2,927 | | 2013 | 2,813 | | 2012 | 2,681 | | 2011 | 2,544 | | 2010 | 2,401 | | 2009 | 2,263 | | 2008 | 2,151 | | 2007 | 2,058 | | 2006 | 1,969 | | 2005 | 1,882 | | 2004 | 1,789 | | 2003 | 1,687 | | 2002 | 1,579 | | 2001 | 1,484 | | 2000 | 1,423 | | 1999 | 1,392 | | 1998 | 1,385 | | 1997 | 1,401 | | 1996 | 1,437 | | 1995 | 1,482 | | 1994 | 1,539 | | 1993 | 1,605 | | 1992 | 1,669 | | 1991 | 1,727 | | 1990 | 1,774 | | 1989 | 1,806 | | 1988 | 1,819 | | 1987 | 1,821 | | 1986 | 1,820 | | 1985 | 1,815 | | 1984 | 1,810 | | 1983 | 1,804 | | 1982 | 1,792 | | 1981 | 1,745 | | 1980 | 1,672 | | 1979 | 1,610 | | 1978 | 1,559 | | 1977 | 1,517 | | 1976 | 1,476 | | 1975 | 1,433 | | 1974 | 1,391 | | 1973 | 1,351 | | 1972 | 1,313 | | 1971 | 1,277 | | 1970 | 1,251 | | 1969 | 1,248 | | 1968 | 1,247 | | 1967 | 1,237 | | 1966 | 1,228 | | 1965 | 1,224 | | 1964 | 1,226 | | 1963 | 1,236 | | 1962 | 1,245 | | 1961 | 1,241 | | 1960 | 1,227 |
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