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Results by year

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

Year Number of Results
1977 1
1978 1
1979 2
1981 1
1982 1
1983 1
1984 1
1985 2
1986 1
1987 1
1989 3
1990 4
1991 3
1993 3
1994 1
1995 7
1996 6
1997 2
1998 5
1999 7
2000 7
2001 5
2002 6
2003 2
2004 5
2005 7
2006 16
2007 16
2008 12
2009 17
2010 14
2011 25
2012 27
2013 27
2014 32
2015 39
2016 37
2017 22
2018 19
2019 30
2020 6
Text availability
Article attribute
Article type
Publication date

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384 results
Results by year
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