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Results by year

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

Year Number of Results
1972 1
1981 3
1983 2
1984 1
1986 1
1987 1
1988 2
1989 1
1990 3
1993 1
1994 1
1995 3
1996 1
1998 3
1999 5
2000 5
2001 5
2002 6
2003 6
2004 2
2005 2
2006 2
2007 3
2008 6
2009 7
2010 6
2011 6
2012 10
2013 13
2014 19
2015 16
2016 19
2017 17
2018 21
2019 31
2020 9
Text availability
Article attribute
Article type
Publication date

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206 results
Results by year
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