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Results by year

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

Year Number of Results
1959 1
1961 1
1962 2
1963 4
1964 6
1965 4
1966 3
1967 2
1968 2
1969 6
1970 3
1971 3
1972 3
1973 5
1974 3
1975 2
1976 10
1977 3
1978 2
1979 8
1980 3
1981 15
1982 5
1983 3
1984 7
1985 12
1986 15
1987 15
1988 13
1989 9
1990 6
1991 5
1992 5
1993 8
1994 10
1995 14
1996 12
1997 10
1998 13
1999 19
2000 25
2001 29
2002 28
2003 25
2004 27
2005 26
2006 35
2007 33
2008 33
2009 27
2010 26
2011 31
2012 39
2013 36
2014 32
2015 44
2016 29
2017 32
2018 29
2019 48
2020 7
Text availability
Article attribute
Article type
Publication date

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846 results
Results by year
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