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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
1964 1
1966 1
1968 1
1970 2
1971 1
1972 2
1974 2
1975 2
1976 3
1977 1
1978 3
1979 1
1980 4
1981 4
1982 3
1983 7
1984 6
1985 8
1986 7
1987 21
1988 23
1989 20
1990 28
1991 26
1992 31
1993 34
1994 41
1995 43
1996 54
1997 51
1998 82
1999 52
2000 94
2001 85
2002 97
2003 126
2004 143
2005 171
2006 207
2007 241
2008 279
2009 326
2010 365
2011 381
2012 392
2013 447
2014 484
2015 507
2016 513
2017 547
2018 535
2019 670
2020 129
Text availability
Article attribute
Article type
Publication date

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6,615 results
Results by year
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