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Results by year

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

Year Number of Results
1980 1
1981 2
1982 1
1983 1
1984 3
1986 5
1987 1
1988 2
1989 3
1990 3
1991 3
1992 4
1993 5
1994 6
1995 7
1996 8
1997 14
1998 5
1999 12
2000 17
2001 11
2002 15
2003 19
2004 21
2005 39
2006 29
2007 32
2008 39
2009 50
2010 62
2011 61
2012 73
2013 88
2014 119
2015 144
2016 158
2017 159
2018 187
2019 207
2020 42
Text availability
Article attribute
Article type
Publication date

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1,504 results
Results by year
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