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

Year Number of Results
1987 1
1988 3
1989 5
1990 3
1991 4
1992 3
1993 9
1994 4
1995 1
1996 7
1997 12
1998 8
1999 5
2000 8
2002 35
2003 31
2004 44
2005 48
2006 33
2007 46
2008 40
2009 50
2010 83
2011 112
2012 163
2013 142
2014 167
2015 100
2016 93
2017 126
2018 149
2019 144
2020 156
2021 27
Text availability
Article attribute
Article type
Publication date

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1,862 results
Results by year
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