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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
1962 1
1965 1
1966 2
1967 1
1968 1
1969 1
1970 2
1972 2
1973 2
1974 2
1975 1
1976 4
1977 2
1978 10
1979 2
1980 5
1981 7
1982 2
1983 7
1984 3
1985 8
1986 4
1987 5
1988 11
1989 6
1990 12
1991 10
1992 9
1993 21
1994 16
1995 14
1996 8
1997 13
1998 29
1999 22
2000 44
2001 42
2002 48
2003 33
2004 68
2005 75
2006 84
2007 94
2008 106
2009 133
2010 164
2011 170
2012 193
2013 197
2014 221
2015 227
2016 226
2017 236
2018 191
2019 206
2020 40
Text availability
Article attribute
Article type
Publication date

Search Results

2,780 results
Results by year
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