Year | Value | 2022 | 19,823 | 2021 | 19,398 | 2020 | 18,947 | 2019 | 18,521 | 2018 | 18,141 | 2017 | 17,816 | 2016 | 17,529 | 2015 | 17,242 | 2014 | 16,931 | 2013 | 16,575 | 2012 | 16,162 | 2011 | 15,706 | 2010 | 15,194 | 2009 | 14,691 | 2008 | 14,293 | 2007 | 13,997 | 2006 | 13,785 | 2005 | 13,639 | 2004 | 13,524 | 2003 | 13,385 | 2002 | 13,190 | 2001 | 12,936 | 2000 | 12,633 | 1999 | 12,300 | 1998 | 11,953 | 1997 | 11,590 | 1996 | 11,196 | 1995 | 10,757 | 1994 | 10,270 | 1993 | 9,736 | 1992 | 9,153 | 1991 | 8,462 | 1990 | 7,675 | 1989 | 6,927 | 1988 | 6,309 | 1987 | 5,842 | 1986 | 5,520 | 1985 | 5,311 | 1984 | 5,161 | 1983 | 5,018 | 1982 | 4,858 | 1981 | 4,648 | 1980 | 4,404 | 1979 | 4,185 | 1978 | 4,012 | 1977 | 3,893 | 1976 | 3,822 | 1975 | 3,782 | 1974 | 3,744 | 1973 | 3,696 | 1972 | 3,627 | 1971 | 3,511 | 1970 | 3,341 | 1969 | 3,169 | 1968 | 3,023 | 1967 | 2,902 | 1966 | 2,800 | 1965 | 2,712 | 1964 | 2,626 | 1963 | 2,538 | 1962 | 2,453 | 1961 | 2,376 | 1960 | 2,285 |
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