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Results by year

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

Year Number of Results
1968 1
1969 2
1970 1
1971 1
1973 2
1975 2
1976 8
1977 5
1978 8
1979 13
1980 14
1981 8
1982 16
1983 8
1984 6
1985 5
1986 8
1987 6
1988 6
1989 7
1990 2
1991 10
1992 5
1993 2
1994 8
1995 10
1996 10
1997 14
1998 18
1999 22
2000 17
2001 12
2002 28
2003 35
2004 41
2005 69
2006 85
2007 96
2008 98
2009 69
2010 94
2011 108
2012 121
2013 132
2014 160
2015 184
2016 231
2017 241
2018 270
2019 325
2020 56
Text availability
Article attribute
Article type
Publication date

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2,427 results
Results by year
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