Year | Value | 2022 | 33,755 | 2021 | 33,012 | 2020 | 32,491 | 2019 | 31,959 | 2018 | 31,601 | 2017 | 31,103 | 2016 | 30,397 | 2015 | 29,058 | 2014 | 27,101 | 2013 | 25,220 | 2012 | 24,016 | 2011 | 24,012 | 2010 | 24,907 | 2009 | 26,236 | 2008 | 27,852 | 2007 | 29,191 | 2006 | 29,446 | 2005 | 29,185 | 2004 | 28,711 | 2003 | 27,928 | 2002 | 27,418 | 2001 | 27,343 | 2000 | 27,705 | 1999 | 28,260 | 1998 | 28,937 | 1997 | 29,394 | 1996 | 29,186 | 1995 | 28,290 | 1994 | 27,166 | 1993 | 26,050 | 1992 | 24,464 | 1991 | 22,826 | 1990 | 21,631 | 1989 | 20,433 | 1988 | 19,350 | 1987 | 18,188 | 1986 | 16,943 | 1985 | 16,573 | 1984 | 17,220 | 1983 | 17,989 | 1982 | 19,219 | 1981 | 21,000 | 1980 | 22,125 | 1979 | 22,479 | 1978 | 22,491 | 1977 | 22,362 | 1976 | 22,198 | 1975 | 22,025 | 1974 | 21,857 | 1973 | 21,900 | 1972 | 21,969 | 1971 | 21,670 | 1970 | 21,229 | 1969 | 20,817 | 1968 | 20,163 | 1967 | 19,252 | 1966 | 18,401 | 1965 | 17,696 | 1964 | 16,947 | 1963 | 16,192 | 1962 | 15,706 | 1961 | 15,462 | 1960 | 15,391 |
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