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Results by year

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

Year Number of Results
1960 1
1969 1
1973 1
1976 1
1977 1
1978 2
1979 2
1980 4
1981 2
1982 3
1985 3
1986 3
1987 1
1988 2
1989 1
1990 2
1991 2
1992 2
1993 3
1994 2
1995 4
1996 10
1997 13
1998 15
1999 11
2000 10
2001 21
2002 13
2003 36
2004 19
2005 9
2006 10
2007 24
2008 25
2009 32
2010 24
2011 38
2012 43
2013 33
2014 27
2015 24
2016 15
2017 8
2018 8
2019 13
2020 4
Text availability
Article attribute
Article type
Publication date

Search Results

455 results
Results by year
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