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Results by year

Table representation of search results timeline featuring number of search results per year.

Year Number of Results
1971 1
1977 3
1978 2
1979 3
1980 2
1981 2
1982 1
1983 4
1984 2
1985 2
1986 4
1987 4
1988 5
1989 6
1990 1
1991 4
1992 3
1993 10
1994 10
1995 4
1996 7
1997 5
1998 11
1999 6
2000 5
2001 9
2002 3
2003 3
2004 6
2005 8
2006 10
2007 9
2008 17
2009 3
2010 16
2011 20
2012 18
2013 18
2014 16
2015 26
2016 18
2017 16
2018 13
2019 20
2020 10
Text availability
Article attribute
Article type
Publication date

Search Results

334 results
Results by year
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