| Year | Value | | 2022 | 55,128 | | 2021 | 55,614 | | 2020 | 56,073 | | 2019 | 56,658 | | 2018 | 57,479 | | 2017 | 58,317 | | 2016 | 59,155 | | 2015 | 59,987 | | 2014 | 60,803 | | 2013 | 61,599 | | 2012 | 62,371 | | 2011 | 63,136 | | 2010 | 63,836 | | 2009 | 64,441 | | 2008 | 64,938 | | 2007 | 65,356 | | 2006 | 65,713 | | 2005 | 66,022 | | 2004 | 66,277 | | 2003 | 66,477 | | 2002 | 66,597 | | 2001 | 66,727 | | 2000 | 66,936 | | 1999 | 67,406 | | 1998 | 67,786 | | 1997 | 68,071 | | 1996 | 68,258 | | 1995 | 68,360 | | 1994 | 68,374 | | 1993 | 68,299 | | 1992 | 68,146 | | 1991 | 67,951 | | 1990 | 67,816 | | 1989 | 67,518 | | 1988 | 67,125 | | 1987 | 66,676 | | 1986 | 66,307 | | 1985 | 66,044 | | 1984 | 65,872 | | 1983 | 65,812 | | 1982 | 65,781 | | 1981 | 65,594 | | 1980 | 64,662 | | 1979 | 63,558 | | 1978 | 62,324 | | 1977 | 61,069 | | 1976 | 59,890 | | 1975 | 58,816 | | 1974 | 57,857 | | 1973 | 56,974 | | 1972 | 56,131 | | 1971 | 55,296 | | 1970 | 54,682 | | 1969 | 54,868 | | 1968 | 55,110 | | 1967 | 55,376 | | 1966 | 55,697 | | 1965 | 56,069 | | 1964 | 56,450 | | 1963 | 56,784 | | 1962 | 57,028 | | 1961 | 57,159 | | 1960 | 57,102 |
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