Year | Value | 2022 | 27,840 | 2021 | 27,868 | 2020 | 27,815 | 2019 | 27,671 | 2018 | 27,501 | 2017 | 27,254 | 2016 | 26,814 | 2015 | 26,248 | 2014 | 25,623 | 2013 | 24,996 | 2012 | 24,486 | 2011 | 24,191 | 2010 | 24,095 | 2009 | 24,091 | 2008 | 24,108 | 2007 | 24,158 | 2006 | 24,268 | 2005 | 24,465 | 2004 | 24,807 | 2003 | 25,245 | 2002 | 25,500 | 2001 | 25,359 | 2000 | 24,848 | 1999 | 23,931 | 1998 | 22,773 | 1997 | 21,727 | 1996 | 20,924 | 1995 | 20,384 | 1994 | 20,423 | 1993 | 20,999 | 1992 | 21,608 | 1991 | 22,138 | 1990 | 22,629 | 1989 | 23,000 | 1988 | 23,220 | 1987 | 23,479 | 1986 | 23,804 | 1985 | 24,129 | 1984 | 24,533 | 1983 | 25,000 | 1982 | 25,404 | 1981 | 25,595 | 1980 | 25,430 | 1979 | 25,087 | 1978 | 24,717 | 1977 | 24,314 | 1976 | 24,019 | 1975 | 23,882 | 1974 | 23,860 | 1973 | 23,831 | 1972 | 23,646 | 1971 | 22,536 | 1970 | 20,623 | 1969 | 18,818 | 1968 | 17,259 | 1967 | 15,992 | 1966 | 14,965 | 1965 | 14,108 | 1964 | 13,475 | 1963 | 13,253 | 1962 | 13,289 | 1961 | 13,075 | 1960 | 12,643 |
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