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

Year Number of Results
1982 1
1984 1
1985 2
1986 1
1987 2
1988 4
1989 1
1990 3
1991 6
1992 3
1993 4
1994 6
1995 6
1996 6
1997 15
1998 14
1999 13
2000 21
2001 16
2002 23
2003 35
2004 40
2005 52
2006 45
2007 56
2008 62
2009 82
2010 95
2011 111
2012 110
2013 111
2014 171
2015 216
2016 221
2017 280
2018 302
2019 381
2020 447
2021 167
Text availability
Article attribute
Article type
Publication date

Search Results

2,816 results
Results by year
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