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Results by year

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

Year Number of Results
1957 1
1958 1
1959 2
1960 1
1961 2
1963 2
1967 1
1968 1
1971 1
1973 2
1974 2
1975 2
1976 7
1977 6
1978 5
1979 2
1980 5
1981 4
1982 4
1983 7
1984 8
1985 12
1986 7
1987 15
1988 11
1989 5
1990 11
1991 6
1992 6
1993 14
1994 20
1995 14
1996 21
1997 25
1998 24
1999 36
2000 51
2001 45
2002 61
2003 70
2004 69
2005 111
2006 104
2007 121
2008 142
2009 164
2010 212
2011 226
2012 218
2013 216
2014 214
2015 230
2016 220
2017 218
2018 224
2019 317
2020 58
Text availability
Article attribute
Article type
Publication date

Search Results

3,168 results
Results by year
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