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Results by year

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

Year Number of Results
1962 1
1965 2
1980 1
1981 6
1982 3
1983 5
1984 7
1985 6
1986 5
1987 9
1988 7
1989 11
1990 12
1991 14
1992 8
1993 12
1994 16
1995 14
1996 20
1997 21
1998 32
1999 30
2000 36
2001 39
2002 39
2003 45
2004 52
2005 81
2006 105
2007 121
2008 124
2009 158
2010 191
2011 223
2012 306
2013 332
2014 426
2015 510
2016 552
2017 624
2018 756
2019 753
2020 164
Text availability
Article attribute
Article type
Publication date

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5,259 results
Results by year
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