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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
1975 3
1976 1
1977 1
1978 1
1979 4
1980 2
1981 9
1982 15
1983 11
1984 9
1985 6
1986 7
1987 11
1988 8
1989 15
1990 19
1991 13
1992 12
1993 15
1994 16
1995 28
1996 21
1997 14
1998 25
1999 14
2000 21
2001 18
2002 22
2003 17
2004 26
2005 25
2006 11
2007 19
2008 39
2009 20
2010 29
2011 33
2012 22
2013 21
2014 25
2015 31
2016 21
2017 23
2018 17
2019 6
2020 0
Text availability
Article attribute
Article type
Publication date

Search Results

717 results
Results by year
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