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Results by year

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

Year Number of Results
1975 1
1976 1
1988 1
1989 1
1991 3
1992 3
1993 3
1995 1
1996 1
1999 2
2001 2
2002 1
2004 1
2005 1
2006 3
2007 6
2008 7
2009 8
2010 17
2011 10
2012 18
2013 12
2014 16
2015 30
2016 15
2017 23
2018 30
2019 31
2020 9
Text availability
Article attribute
Article type
Publication date

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223 results
Results by year
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