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Results by year

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

Year Number of Results
1979 1
1985 1
1986 4
1987 2
1989 3
1990 2
1991 3
1997 4
1998 1
2000 1
2002 3
2004 12
2005 14
2006 13
2007 27
2008 18
2009 24
2010 20
2011 17
2012 27
2013 28
2014 36
2015 42
2016 46
2017 60
2018 61
2019 62
2020 8
Text availability
Article attribute
Article type
Publication date

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490 results
Results by year
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