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Results by year

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

Year Number of Results
1979 2
1981 1
1982 3
1983 4
1984 4
1985 4
1986 4
1987 6
1988 5
1989 5
1990 12
1991 8
1992 11
1993 12
1994 21
1995 27
1996 23
1997 26
1998 33
1999 42
2000 45
2001 52
2002 81
2003 103
2004 106
2005 104
2006 139
2007 173
2008 188
2009 218
2010 270
2011 323
2012 360
2013 405
2014 457
2015 523
2016 617
2017 650
2018 687
2019 775
2020 148
Text availability
Article attribute
Article type
Publication date

Search Results

5,987 results
Results by year
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