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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 1
1980 3
1981 6
1982 2
1983 2
1984 2
1985 4
1986 7
1987 4
1988 7
1989 3
1990 6
1991 7
1992 10
1993 16
1994 8
1995 18
1996 19
1997 14
1998 12
1999 21
2000 23
2001 38
2002 34
2003 42
2004 71
2005 59
2006 71
2007 93
2008 108
2009 135
2010 147
2011 170
2012 194
2013 221
2014 252
2015 298
2016 321
2017 330
2018 383
2019 489
2020 526
2021 387
Text availability
Article attribute
Article type
Publication date

Search Results

4,118 results
Results by year
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