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

Year Number of Results
1975 5
1976 2
1977 2
1978 3
1979 6
1980 3
1981 6
1982 2
1983 2
1984 3
1985 1
1986 3
1987 3
1988 3
1989 3
1990 3
1991 5
1992 7
1993 9
1994 22
1995 30
1996 39
1997 45
1998 31
1999 50
2000 45
2001 45
2002 56
2003 53
2004 58
2005 56
2006 65
2007 58
2008 56
2009 61
2010 72
2011 78
2012 60
2013 81
2014 71
2015 69
2016 81
2017 58
2018 68
2019 47
2020 2
Text availability
Article attribute
Article type
Publication date

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1,400 results
Results by year
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