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

Year Number of Results
1971 1
1999 3
2000 2
2001 2
2002 5
2003 8
2004 6
2005 4
2006 6
2007 5
2008 13
2009 12
2010 22
2011 22
2012 20
2013 15
2014 28
2015 34
2016 35
2017 39
2018 33
2019 30
2020 36
2021 38
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Article attribute
Article type
Publication date

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361 results
Results by year
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