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

Year Number of Results
1976 1
1977 12
1978 3
1979 2
1980 8
1981 7
1982 6
1983 10
1984 15
1985 12
1986 11
1987 8
1988 5
1989 10
1990 16
1991 17
1992 13
1993 17
1994 22
1995 17
1996 20
1997 21
1998 24
1999 26
2000 24
2001 26
2002 31
2003 37
2004 50
2005 47
2006 33
2007 42
2008 45
2009 42
2010 52
2011 42
2012 48
2013 55
2014 67
2015 42
2016 47
2017 38
2018 45
2019 30
2020 3
Text availability
Article attribute
Article type
Publication date

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1,067 results
Results by year
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