| Year | Value | | 2022 | 5,717 | | 2021 | 5,649 | | 2020 | 5,587 | | 2019 | 5,530 | | 2018 | 5,474 | | 2017 | 5,424 | | 2016 | 5,379 | | 2015 | 5,343 | | 2014 | 5,310 | | 2013 | 5,276 | | 2012 | 5,245 | | 2011 | 5,215 | | 2010 | 5,196 | | 2009 | 5,180 | | 2008 | 5,159 | | 2007 | 5,142 | | 2006 | 5,123 | | 2005 | 5,100 | | 2004 | 5,075 | | 2003 | 5,049 | | 2002 | 5,022 | | 2001 | 4,994 | | 2000 | 4,997 | | 1999 | 5,027 | | 1998 | 5,054 | | 1997 | 5,081 | | 1996 | 5,105 | | 1995 | 5,091 | | 1994 | 5,044 | | 1993 | 4,997 | | 1992 | 4,951 | | 1991 | 4,906 | | 1990 | 4,869 | | 1989 | 4,839 | | 1988 | 4,807 | | 1987 | 4,776 | | 1986 | 4,747 | | 1985 | 4,719 | | 1984 | 4,692 | | 1983 | 4,664 | | 1982 | 4,635 | | 1981 | 4,610 | | 1980 | 4,569 | | 1979 | 4,501 | | 1978 | 4,428 | | 1977 | 4,357 | | 1976 | 4,288 | | 1975 | 4,220 | | 1974 | 4,150 | | 1973 | 4,082 | | 1972 | 4,015 | | 1971 | 3,951 | | 1970 | 3,892 | | 1969 | 3,835 | | 1968 | 3,773 | | 1967 | 3,710 | | 1966 | 3,652 | | 1965 | 3,602 | | 1964 | 3,554 | | 1963 | 3,506 | | 1962 | 3,462 | | 1961 | 3,420 | | 1960 | 3,366 |
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