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Results by year

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

Year Number of Results
1970 1
1973 1
1974 4
1975 3
1976 2
1977 6
1978 5
1979 2
1980 2
1981 4
1982 6
1983 1
1984 1
1985 8
1986 5
1987 15
1988 16
1989 14
1990 16
1991 16
1992 15
1993 30
1994 6
1995 16
1996 20
1997 26
1998 18
1999 23
2000 17
2001 21
2002 28
2003 27
2004 23
2005 24
2006 30
2007 20
2008 27
2009 30
2010 36
2011 51
2012 50
2013 60
2014 78
2015 82
2016 78
2017 78
2018 101
2019 135
2020 157
2021 80
Text availability
Article attribute
Article type
Publication date

Search Results

1,397 results
Results by year
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