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Results by year

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

Year Number of Results
1981 1
1983 1
1984 2
1985 1
1986 1
1988 2
1989 3
1991 6
1992 9
1993 5
1994 4
1995 4
1996 4
1997 8
1998 14
1999 7
2000 9
2001 7
2002 10
2003 8
2004 6
2005 9
2006 6
2007 4
2008 3
2009 7
2010 1
2011 5
2012 9
2013 6
2014 4
2015 5
2016 7
2017 6
2018 16
2019 24
2020 6
Text availability
Article attribute
Article type
Publication date

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216 results
Results by year
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