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Results by year

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

Year Number of Results
1981 4
1982 2
1983 2
1984 1
1985 10
1986 9
1987 6
1988 17
1989 24
1990 16
1991 12
1992 16
1993 11
1994 12
1995 25
1996 29
1997 30
1998 36
1999 35
2000 61
2001 53
2002 83
2003 85
2004 105
2005 113
2006 150
2007 150
2008 183
2009 197
2010 243
2011 295
2012 338
2013 361
2014 435
2015 484
2016 491
2017 575
2018 648
2019 787
2020 957
2021 420
Text availability
Article attribute
Article type
Publication date

Search Results

6,725 results
Results by year
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