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

Year Number of Results
1979 1
1984 1
1985 1
1986 2
1987 4
1988 5
1989 5
1990 8
1991 5
1992 4
1993 12
1994 10
1995 9
1996 15
1997 15
1998 23
1999 17
2000 30
2001 30
2002 35
2003 53
2004 57
2005 70
2006 85
2007 101
2008 111
2009 131
2010 199
2011 222
2012 221
2013 270
2014 384
2015 403
2016 391
2017 422
2018 498
2019 523
2020 610
2021 331
Text availability
Article attribute
Article type
Publication date

Search Results

4,769 results
Results by year
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