Year | Value | 2022 | 27,220 | 2021 | 26,912 | 2020 | 27,086 | 2019 | 26,826 | 2018 | 26,112 | 2017 | 25,525 | 2016 | 25,136 | 2015 | 24,861 | 2014 | 24,566 | 2013 | 24,370 | 2012 | 24,315 | 2011 | 24,389 | 2010 | 24,572 | 2009 | 24,744 | 2008 | 24,853 | 2007 | 24,985 | 2006 | 25,194 | 2005 | 25,664 | 2004 | 26,456 | 2003 | 27,263 | 2002 | 28,094 | 2001 | 28,923 | 2000 | 29,771 | 1999 | 30,677 | 1998 | 31,621 | 1997 | 32,568 | 1996 | 33,504 | 1995 | 34,172 | 1994 | 34,350 | 1993 | 34,446 | 1992 | 34,516 | 1991 | 34,576 | 1990 | 34,068 | 1989 | 34,143 | 1988 | 34,222 | 1987 | 34,352 | 1986 | 34,530 | 1985 | 34,224 | 1984 | 33,654 | 1983 | 33,677 | 1982 | 33,232 | 1981 | 32,555 | 1980 | 32,345 | 1979 | 32,033 | 1978 | 31,738 | 1977 | 31,434 | 1976 | 31,339 | 1975 | 31,207 | 1974 | 31,003 | 1973 | 31,051 | 1972 | 31,104 | 1971 | 31,154 | 1970 | 31,176 | 1969 | 31,373 | 1968 | 31,769 | 1967 | 32,083 | 1966 | 32,264 | 1965 | 32,438 | 1964 | 32,491 | 1963 | 32,423 | 1962 | 32,364 | 1961 | 32,301 | 1960 | 32,234 |
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