Year | Value | 2022 | 21,882 | 2021 | 21,280 | 2020 | 20,782 | 2019 | 20,179 | 2018 | 19,539 | 2017 | 18,917 | 2016 | 18,207 | 2015 | 17,532 | 2014 | 16,946 | 2013 | 16,426 | 2012 | 15,897 | 2011 | 15,328 | 2010 | 14,789 | 2009 | 14,321 | 2008 | 13,881 | 2007 | 13,535 | 2006 | 13,281 | 2005 | 12,921 | 2004 | 12,376 | 2003 | 11,899 | 2002 | 11,518 | 2001 | 11,173 | 2000 | 11,179 | 1999 | 11,396 | 1998 | 11,398 | 1997 | 11,296 | 1996 | 11,233 | 1995 | 11,162 | 1994 | 11,000 | 1993 | 10,851 | 1992 | 10,806 | 1991 | 10,915 | 1990 | 11,168 | 1989 | 11,423 | 1988 | 11,621 | 1987 | 11,787 | 1986 | 11,832 | 1985 | 11,688 | 1984 | 11,510 | 1983 | 11,412 | 1982 | 11,299 | 1981 | 11,184 | 1980 | 11,105 | 1979 | 10,889 | 1978 | 10,356 | 1977 | 9,720 | 1976 | 9,196 | 1975 | 8,765 | 1974 | 8,702 | 1973 | 9,155 | 1972 | 9,879 | 1971 | 10,526 | 1970 | 10,893 | 1969 | 11,019 | 1968 | 11,103 | 1967 | 11,209 | 1966 | 11,297 | 1965 | 11,392 | 1964 | 11,388 | 1963 | 11,260 | 1962 | 11,137 | 1961 | 11,025 | 1960 | 10,883 |
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