Year | Value | 2022 | 15,070 | 2021 | 15,364 | 2020 | 15,690 | 2019 | 16,020 | 2018 | 16,320 | 2017 | 16,553 | 2016 | 16,689 | 2015 | 16,715 | 2014 | 16,622 | 2013 | 16,442 | 2012 | 16,237 | 2011 | 16,064 | 2010 | 15,995 | 2009 | 16,059 | 2008 | 16,239 | 2007 | 16,491 | 2006 | 16,731 | 2005 | 16,945 | 2004 | 17,131 | 2003 | 17,220 | 2002 | 17,242 | 2001 | 17,293 | 2000 | 17,371 | 1999 | 17,445 | 1998 | 17,544 | 1997 | 17,667 | 1996 | 17,758 | 1995 | 17,810 | 1994 | 17,849 | 1993 | 17,869 | 1992 | 17,849 | 1991 | 17,805 | 1990 | 17,723 | 1989 | 17,527 | 1988 | 17,185 | 1987 | 16,697 | 1986 | 16,075 | 1985 | 15,411 | 1984 | 14,828 | 1983 | 14,366 | 1982 | 14,001 | 1981 | 13,664 | 1980 | 13,304 | 1979 | 12,945 | 1978 | 12,615 | 1977 | 12,323 | 1976 | 12,078 | 1975 | 11,852 | 1974 | 11,626 | 1973 | 11,417 | 1972 | 11,226 | 1971 | 11,035 | 1970 | 10,825 | 1969 | 10,592 | 1968 | 10,347 | 1967 | 10,088 | 1966 | 9,813 | 1965 | 9,505 | 1964 | 9,180 | 1963 | 8,894 | 1962 | 8,684 | 1961 | 8,553 | 1960 | 8,458 |
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