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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
1970 1
1971 1
1974 1
1975 2
1976 3
1978 3
1979 3
1980 4
1981 2
1982 2
1984 1
1985 2
1986 2
1988 1
1989 2
1990 7
1991 4
1992 6
1993 8
1994 12
1995 19
1996 12
1997 14
1998 13
1999 12
2000 15
2001 8
2002 16
2003 15
2004 18
2005 15
2006 20
2007 22
2008 38
2009 32
2010 31
2011 52
2012 40
2013 43
2014 36
2015 46
2016 73
2017 50
2018 54
2019 73
2020 12
Text availability
Article attribute
Article type
Publication date

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750 results
Results by year
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