Year | Value | 2022 | 30,570 | 2021 | 30,305 | 2020 | 29,949 | 2019 | 29,444 | 2018 | 28,869 | 2017 | 28,392 | 2016 | 28,014 | 2015 | 27,709 | 2014 | 27,411 | 2013 | 27,041 | 2012 | 26,682 | 2011 | 26,366 | 2010 | 26,095 | 2009 | 25,866 | 2008 | 25,596 | 2007 | 25,317 | 2006 | 25,080 | 2005 | 24,865 | 2004 | 24,592 | 2003 | 24,260 | 2002 | 24,006 | 2001 | 23,795 | 2000 | 23,545 | 1999 | 23,243 | 1998 | 22,886 | 1997 | 22,486 | 1996 | 22,079 | 1995 | 21,594 | 1994 | 21,143 | 1993 | 20,941 | 1992 | 20,746 | 1991 | 20,339 | 1990 | 19,951 | 1989 | 19,637 | 1988 | 19,289 | 1987 | 18,919 | 1986 | 18,489 | 1985 | 18,065 | 1984 | 17,765 | 1983 | 17,392 | 1982 | 16,711 | 1981 | 16,094 | 1980 | 15,900 | 1979 | 15,803 | 1978 | 15,675 | 1977 | 15,629 | 1976 | 15,533 | 1975 | 15,328 | 1974 | 14,994 | 1973 | 14,483 | 1972 | 13,841 | 1971 | 13,251 | 1970 | 12,819 | 1969 | 12,533 | 1968 | 12,417 | 1967 | 12,448 | 1966 | 12,506 | 1965 | 12,508 | 1964 | 12,435 | 1963 | 12,287 | 1962 | 12,077 | 1961 | 11,855 | 1960 | 11,651 |
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