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Results by year

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

Year Number of Results
1963 1
1975 3
1976 1
1977 1
1978 8
1979 9
1980 8
1981 8
1982 8
1983 9
1984 14
1985 28
1986 14
1987 10
1988 11
1989 23
1990 22
1991 12
1992 7
1993 8
1994 8
1995 61
1996 139
1997 271
1998 509
1999 963
2000 1360
2001 1882
2002 2259
2003 2486
2004 1712
2005 428
2006 465
2007 486
2008 549
2009 567
2010 617
2011 694
2012 747
2013 822
2014 814
2015 830
2016 724
2017 628
2018 603
2019 247
2020 1
Text availability
Article attribute
Article type
Publication date

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19,915 results
Results by year
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