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Results by year

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

Year Number of Results
1969 1
1970 1
1979 1
1981 1
1988 1
1989 2
1990 5
1991 2
1992 4
1994 4
1995 6
1996 4
1997 5
1998 6
1999 5
2000 4
2001 4
2002 6
2003 6
2004 3
2005 3
2006 8
2007 3
2008 10
2009 12
2010 13
2011 22
2012 20
2013 27
2014 32
2015 32
2016 40
2017 44
2018 48
2019 44
2020 7
Text availability
Article attribute
Article type
Publication date

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380 results
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