Year | Value | 2022 | 27,135 | 2021 | 27,164 | 2020 | 27,120 | 2019 | 27,022 | 2018 | 26,885 | 2017 | 26,687 | 2016 | 26,398 | 2015 | 26,023 | 2014 | 25,526 | 2013 | 24,924 | 2012 | 24,323 | 2011 | 23,801 | 2010 | 23,396 | 2009 | 23,143 | 2008 | 23,051 | 2007 | 23,069 | 2006 | 23,153 | 2005 | 23,299 | 2004 | 23,489 | 2003 | 23,713 | 2002 | 23,827 | 2001 | 23,665 | 2000 | 23,265 | 1999 | 22,584 | 1998 | 21,716 | 1997 | 20,913 | 1996 | 20,251 | 1995 | 19,760 | 1994 | 19,784 | 1993 | 20,322 | 1992 | 20,904 | 1991 | 21,420 | 1990 | 21,912 | 1989 | 22,300 | 1988 | 22,547 | 1987 | 22,826 | 1986 | 23,159 | 1985 | 23,474 | 1984 | 23,846 | 1983 | 24,263 | 1982 | 24,617 | 1981 | 24,780 | 1980 | 24,636 | 1979 | 24,338 | 1978 | 24,020 | 1977 | 23,676 | 1976 | 23,390 | 1975 | 23,186 | 1974 | 23,020 | 1973 | 22,793 | 1972 | 22,396 | 1971 | 21,204 | 1970 | 19,385 | 1969 | 17,749 | 1968 | 16,407 | 1967 | 15,388 | 1966 | 14,626 | 1965 | 14,041 | 1964 | 13,599 | 1963 | 13,320 | 1962 | 13,141 | 1961 | 12,827 | 1960 | 12,395 |
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