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Results by year

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

Year Number of Results
1968 1
1974 1
1975 2
1977 1
1978 2
1980 2
1981 3
1982 2
1983 4
1984 2
1985 2
1986 3
1987 4
1988 2
1989 2
1990 4
1991 4
1992 4
1993 3
1994 5
1995 7
1996 4
1997 6
1998 2
1999 5
2000 4
2001 5
2002 2
2003 7
2004 7
2005 10
2006 13
2007 6
2008 11
2009 21
2010 19
2011 19
2012 13
2013 20
2014 22
2015 22
2016 20
2017 15
2018 18
2019 8
2020 2
Text availability
Article attribute
Article type
Publication date

Search Results

308 results
Results by year
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