Year | Value | 2022 | 14,529 | 2021 | 14,433 | 2020 | 14,458 | 2019 | 14,675 | 2018 | 14,929 | 2017 | 15,221 | 2016 | 15,549 | 2015 | 15,858 | 2014 | 16,084 | 2013 | 16,520 | 2012 | 17,233 | 2011 | 17,960 | 2010 | 18,700 | 2009 | 19,419 | 2008 | 20,005 | 2007 | 20,382 | 2006 | 20,551 | 2005 | 20,491 | 2004 | 20,226 | 2003 | 19,817 | 2002 | 19,236 | 2001 | 18,444 | 2000 | 17,496 | 1999 | 16,540 | 1998 | 15,658 | 1997 | 14,855 | 1996 | 14,154 | 1995 | 13,536 | 1994 | 12,963 | 1993 | 12,474 | 1992 | 12,113 | 1991 | 11,853 | 1990 | 11,650 | 1989 | 11,394 | 1988 | 11,097 | 1987 | 10,870 | 1986 | 10,732 | 1985 | 10,651 | 1984 | 10,471 | 1983 | 10,122 | 1982 | 9,680 | 1981 | 9,208 | 1980 | 8,746 | 1979 | 8,318 | 1978 | 7,928 | 1977 | 7,583 | 1976 | 7,291 | 1975 | 7,030 | 1974 | 6,738 | 1973 | 6,382 | 1972 | 6,008 | 1971 | 5,650 | 1970 | 5,316 | 1969 | 5,011 | 1968 | 4,742 | 1967 | 4,531 | 1966 | 4,377 | 1965 | 4,250 | 1964 | 4,299 | 1963 | 4,468 | 1962 | 4,572 | 1961 | 4,639 | 1960 | 4,676 |
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