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Results by year

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

Year Number of Results
1960 1
1963 1
1964 1
1973 1
1974 4
1975 8
1976 8
1977 2
1978 4
1979 5
1980 5
1981 1
1982 6
1983 3
1984 3
1985 7
1986 4
1987 6
1988 9
1989 10
1990 19
1991 23
1992 28
1993 39
1994 76
1995 179
1996 251
1997 280
1998 353
1999 386
2000 450
2001 496
2002 470
2003 427
2004 441
2005 457
2006 448
2007 488
2008 441
2009 377
2010 376
2011 362
2012 401
2013 404
2014 367
2015 227
2016 183
2017 169
2018 96
2019 33
2020 2
Text availability
Article attribute
Article type
Publication date

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8,160 results
Results by year
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