Year | Value | 2022 | 24,647 | 2021 | 23,729 | 2020 | 22,873 | 2019 | 21,953 | 2018 | 20,979 | 2017 | 20,085 | 2016 | 19,370 | 2015 | 18,872 | 2014 | 18,612 | 2013 | 18,564 | 2012 | 18,634 | 2011 | 18,630 | 2010 | 18,466 | 2009 | 18,101 | 2008 | 17,643 | 2007 | 17,216 | 2006 | 16,851 | 2005 | 16,654 | 2004 | 16,620 | 2003 | 16,681 | 2002 | 16,722 | 2001 | 16,598 | 2000 | 16,182 | 1999 | 15,631 | 1998 | 15,122 | 1997 | 14,775 | 1996 | 14,682 | 1995 | 14,805 | 1994 | 15,129 | 1993 | 15,461 | 1992 | 15,506 | 1991 | 15,161 | 1990 | 14,510 | 1989 | 13,650 | 1988 | 12,659 | 1987 | 11,756 | 1986 | 11,180 | 1985 | 10,883 | 1984 | 10,708 | 1983 | 10,583 | 1982 | 10,382 | 1981 | 10,088 | 1980 | 9,819 | 1979 | 9,619 | 1978 | 9,492 | 1977 | 9,422 | 1976 | 9,379 | 1975 | 9,309 | 1974 | 9,144 | 1973 | 8,918 | 1972 | 8,698 | 1971 | 8,476 | 1970 | 8,248 | 1969 | 8,015 | 1968 | 7,774 | 1967 | 7,530 | 1966 | 7,295 | 1965 | 7,074 | 1964 | 6,867 | 1963 | 6,674 | 1962 | 6,498 | 1961 | 6,330 | 1960 | 6,163 |
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