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

Year Number of Results
1988 1
1989 3
1991 1
1992 2
1997 1
1998 2
1999 2
2000 5
2001 1
2002 1
2003 2
2005 1
2009 2
2010 2
2011 3
2012 2
2013 1
2014 9
2015 9
2016 18
2017 31
2018 29
2019 15
2020 27
2021 19
Text availability
Article attribute
Article type
Publication date

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170 results
Results by year
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