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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 1
1979 1
1980 1
1981 1
1982 2
1983 1
1984 2
1985 2
1986 4
1987 4
1988 3
1989 8
1990 8
1991 7
1992 10
1993 13
1994 7
1995 8
1996 11
1997 11
1998 6
1999 5
2000 13
2001 12
2002 15
2003 13
2004 15
2005 24
2006 32
2007 20
2008 16
2009 14
2010 11
2011 2
2012 9
2013 10
2014 3
2015 12
2016 7
2017 11
2018 2
2019 7
2020 0
Text availability
Article attribute
Article type
Publication date

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338 results
Results by year
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