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Results by year

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

Year Number of Results
1966 1
1979 2
1980 12
1981 7
1982 8
1983 13
1984 15
1985 14
1986 17
1987 21
1988 23
1989 37
1990 30
1991 42
1992 39
1993 39
1994 46
1995 49
1996 68
1997 96
1998 127
1999 103
2000 133
2001 140
2002 181
2003 220
2004 278
2005 370
2006 440
2007 487
2008 575
2009 682
2010 796
2011 956
2012 1216
2013 1407
2014 1697
2015 1928
2016 2088
2017 2350
2018 2732
2019 3270
2020 588
Text availability
Article attribute
Article type
Publication date

Search Results

20,992 results
Results by year
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