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Results by year

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

Year Number of Results
1961 1
1979 1
1980 2
1981 1
1982 2
1983 3
1984 1
1985 3
1986 1
1987 1
1988 1
1989 2
1990 4
1991 3
1992 5
1993 5
1994 12
1995 6
1996 17
1997 10
1998 9
1999 15
2000 15
2001 22
2002 10
2003 14
2004 9
2005 13
2006 20
2007 36
2008 20
2009 29
2010 33
2011 45
2012 38
2013 24
2014 13
2015 6
2016 5
2017 12
2018 9
2019 4
2020 1
Text availability
Article attribute
Article type
Publication date

Search Results

439 results
Results by year
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