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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 2
1962 1
1963 1
1977 1
1981 4
1982 2
1983 1
1984 1
1985 1
1986 4
1987 5
1988 5
1989 7
1990 3
1991 3
1992 7
1993 6
1994 11
1995 9
1996 11
1997 13
1998 13
1999 17
2000 15
2001 20
2002 15
2003 26
2004 34
2005 48
2006 57
2007 58
2008 107
2009 100
2010 99
2011 111
2012 135
2013 161
2014 165
2015 200
2016 265
2017 276
2018 326
2019 352
2020 78
Text availability
Article attribute
Article type
Publication date

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2,438 results
Results by year
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