Year | Value | 2022 | 16,678 | 2021 | 16,704 | 2020 | 16,838 | 2019 | 16,964 | 2018 | 17,013 | 2017 | 17,035 | 2016 | 17,030 | 2015 | 17,012 | 2014 | 17,026 | 2013 | 17,080 | 2012 | 17,085 | 2011 | 16,934 | 2010 | 16,615 | 2009 | 16,282 | 2008 | 15,895 | 2007 | 15,411 | 2006 | 15,066 | 2005 | 14,908 | 2004 | 14,789 | 2003 | 14,714 | 2002 | 14,661 | 2001 | 14,473 | 2000 | 14,190 | 1999 | 13,926 | 1998 | 13,652 | 1997 | 13,437 | 1996 | 13,403 | 1995 | 13,422 | 1994 | 13,504 | 1993 | 13,697 | 1992 | 13,850 | 1991 | 13,945 | 1990 | 14,075 | 1989 | 14,029 | 1988 | 13,863 | 1987 | 13,806 | 1986 | 13,776 | 1985 | 13,784 | 1984 | 13,881 | 1983 | 13,903 | 1982 | 13,753 | 1981 | 13,530 | 1980 | 13,263 | 1979 | 12,921 | 1978 | 12,457 | 1977 | 11,911 | 1976 | 11,342 | 1975 | 10,804 | 1974 | 10,287 | 1973 | 9,760 | 1972 | 9,228 | 1971 | 8,703 | 1970 | 8,178 | 1969 | 7,739 | 1968 | 7,424 | 1967 | 7,154 | 1966 | 6,880 | 1965 | 6,564 | 1964 | 6,251 | 1963 | 5,978 | 1962 | 5,737 | 1961 | 5,540 | 1960 | 5,372 |
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