| Year | Value | | 2022 | 5,403 | | 2021 | 5,252 | | 2020 | 5,088 | | 2019 | 4,873 | | 2018 | 4,643 | | 2017 | 4,392 | | 2016 | 4,124 | | 2015 | 3,911 | | 2014 | 3,767 | | 2013 | 3,643 | | 2012 | 3,587 | | 2011 | 3,619 | | 2010 | 3,612 | | 2009 | 3,511 | | 2008 | 3,434 | | 2007 | 3,408 | | 2006 | 3,365 | | 2005 | 3,369 | | 2004 | 3,442 | | 2003 | 3,488 | | 2002 | 3,445 | | 2001 | 3,381 | | 2000 | 3,313 | | 1999 | 3,189 | | 1998 | 3,100 | | 1997 | 3,087 | | 1996 | 3,091 | | 1995 | 3,115 | | 1994 | 3,165 | | 1993 | 3,227 | | 1992 | 3,294 | | 1991 | 3,358 | | 1990 | 3,412 | | 1989 | 3,483 | | 1988 | 3,544 | | 1987 | 3,556 | | 1986 | 3,535 | | 1985 | 3,494 | | 1984 | 3,433 | | 1983 | 3,357 | | 1982 | 3,269 | | 1981 | 3,166 | | 1980 | 3,053 | | 1979 | 2,950 | | 1978 | 2,864 | | 1977 | 2,779 | | 1976 | 2,699 | | 1975 | 2,623 | | 1974 | 2,551 | | 1973 | 2,486 | | 1972 | 2,419 | | 1971 | 2,324 | | 1970 | 2,186 | | 1969 | 2,005 | | 1968 | 1,770 | | 1967 | 1,507 | | 1966 | 1,280 | | 1965 | 1,130 | | 1964 | 1,059 | | 1963 | 1,069 | | 1962 | 1,146 | | 1961 | 1,215 | | 1960 | 1,227 |
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