Year | Value | 2022 | 19,479 | 2021 | 20,962 | 2020 | 22,069 | 2019 | 22,780 | 2018 | 23,316 | 2017 | 23,808 | 2016 | 24,309 | 2015 | 24,826 | 2014 | 25,519 | 2013 | 26,426 | 2012 | 27,336 | 2011 | 28,129 | 2010 | 28,513 | 2009 | 28,098 | 2008 | 26,862 | 2007 | 25,048 | 2006 | 22,776 | 2005 | 20,212 | 2004 | 17,748 | 2003 | 15,562 | 2002 | 13,752 | 2001 | 12,721 | 2000 | 12,476 | 1999 | 12,543 | 1998 | 12,719 | 1997 | 12,877 | 1996 | 12,958 | 1995 | 13,021 | 1994 | 12,924 | 1993 | 12,667 | 1992 | 12,463 | 1991 | 12,390 | 1990 | 12,520 | 1989 | 13,014 | 1988 | 13,905 | 1987 | 14,869 | 1986 | 15,668 | 1985 | 16,300 | 1984 | 16,768 | 1983 | 17,063 | 1982 | 17,203 | 1981 | 17,265 | 1980 | 17,563 | 1979 | 18,015 | 1978 | 18,287 | 1977 | 18,379 | 1976 | 18,271 | 1975 | 17,915 | 1974 | 17,258 | 1973 | 16,280 | 1972 | 15,001 | 1971 | 13,466 | 1970 | 11,765 | 1969 | 10,111 | 1968 | 8,623 | 1967 | 7,311 | 1966 | 6,234 | 1965 | 5,484 | 1964 | 5,053 | 1963 | 4,919 | 1962 | 4,956 | 1961 | 5,060 | 1960 | 5,374 |
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