Year | Value | 2022 | 8,912 | 2021 | 9,016 | 2020 | 9,159 | 2019 | 9,259 | 2018 | 9,313 | 2017 | 9,334 | 2016 | 9,297 | 2015 | 9,197 | 2014 | 9,096 | 2013 | 9,067 | 2012 | 9,136 | 2011 | 9,294 | 2010 | 9,506 | 2009 | 9,700 | 2008 | 9,765 | 2007 | 9,704 | 2006 | 9,628 | 2005 | 9,587 | 2004 | 9,610 | 2003 | 9,749 | 2002 | 9,916 | 2001 | 9,929 | 2000 | 9,838 | 1999 | 9,762 | 1998 | 9,716 | 1997 | 9,735 | 1996 | 9,870 | 1995 | 10,117 | 1994 | 10,420 | 1993 | 10,745 | 1992 | 11,081 | 1991 | 11,370 | 1990 | 11,576 | 1989 | 11,630 | 1988 | 11,575 | 1987 | 11,581 | 1986 | 11,725 | 1985 | 12,033 | 1984 | 12,472 | 1983 | 12,990 | 1982 | 13,546 | 1981 | 14,113 | 1980 | 14,650 | 1979 | 15,040 | 1978 | 15,222 | 1977 | 15,240 | 1976 | 15,107 | 1975 | 14,851 | 1974 | 14,517 | 1973 | 14,132 | 1972 | 13,704 | 1971 | 13,259 | 1970 | 12,827 | 1969 | 12,369 | 1968 | 11,946 | 1967 | 11,605 | 1966 | 11,279 | 1965 | 10,963 | 1964 | 10,726 | 1963 | 10,526 | 1962 | 10,314 | 1961 | 10,158 | 1960 | 10,051 |
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