Year | Value | 2022 | 26,707 | 2021 | 26,645 | 2020 | 26,577 | 2019 | 26,527 | 2018 | 26,497 | 2017 | 26,491 | 2016 | 26,503 | 2015 | 26,535 | 2014 | 26,587 | 2013 | 26,667 | 2012 | 26,780 | 2011 | 26,921 | 2010 | 27,081 | 2009 | 27,252 | 2008 | 27,400 | 2007 | 27,497 | 2006 | 27,532 | 2005 | 27,515 | 2004 | 27,469 | 2003 | 27,432 | 2002 | 27,377 | 2001 | 27,291 | 2000 | 27,226 | 1999 | 27,180 | 1998 | 27,220 | 1997 | 27,415 | 1996 | 27,758 | 1995 | 28,183 | 1994 | 28,422 | 1993 | 28,558 | 1992 | 28,695 | 1991 | 28,702 | 1990 | 28,644 | 1989 | 28,431 | 1988 | 28,019 | 1987 | 27,582 | 1986 | 27,133 | 1985 | 26,586 | 1984 | 25,815 | 1983 | 25,014 | 1982 | 24,521 | 1981 | 24,294 | 1980 | 24,357 | 1979 | 24,924 | 1978 | 25,794 | 1977 | 26,641 | 1976 | 27,501 | 1975 | 28,443 | 1974 | 29,519 | 1973 | 30,689 | 1972 | 31,914 | 1971 | 32,599 | 1970 | 32,550 | 1969 | 32,227 | 1968 | 31,759 | 1967 | 31,319 | 1966 | 30,935 | 1965 | 30,484 | 1964 | 29,846 | 1963 | 28,767 | 1962 | 27,341 | 1961 | 26,191 | 1960 | 25,361 |
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