Year | Value | 2022 | 16,254 | 2021 | 15,586 | 2020 | 15,199 | 2019 | 14,542 | 2018 | 13,761 | 2017 | 13,178 | 2016 | 12,767 | 2015 | 12,490 | 2014 | 12,417 | 2013 | 12,535 | 2012 | 12,768 | 2011 | 13,120 | 2010 | 13,640 | 2009 | 14,138 | 2008 | 14,486 | 2007 | 14,776 | 2006 | 14,971 | 2005 | 14,955 | 2004 | 14,739 | 2003 | 14,495 | 2002 | 14,210 | 2001 | 13,934 | 2000 | 13,810 | 1999 | 13,888 | 1998 | 14,057 | 1997 | 14,323 | 1996 | 14,731 | 1995 | 15,070 | 1994 | 15,126 | 1993 | 14,963 | 1992 | 14,348 | 1991 | 13,140 | 1990 | 11,689 | 1989 | 10,704 | 1988 | 9,932 | 1987 | 9,519 | 1986 | 9,502 | 1985 | 9,527 | 1984 | 9,527 | 1983 | 9,660 | 1982 | 9,659 | 1981 | 9,580 | 1980 | 9,559 | 1979 | 9,436 | 1978 | 9,269 | 1977 | 9,054 | 1976 | 8,896 | 1975 | 8,794 | 1974 | 8,730 | 1973 | 8,762 | 1972 | 8,789 | 1971 | 8,758 | 1970 | 8,640 | 1969 | 8,504 | 1968 | 8,365 | 1967 | 8,182 | 1966 | 7,978 | 1965 | 7,773 | 1964 | 7,581 | 1963 | 7,432 | 1962 | 7,374 | 1961 | 7,413 | 1960 | 7,541 |
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