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

Year Number of Results
1981 3
1982 2
1983 12
1984 13
1985 22
1986 38
1987 64
1988 71
1989 82
1990 96
1991 115
1992 98
1993 112
1994 100
1995 85
1996 72
1997 89
1998 59
1999 84
2000 66
2001 54
2002 51
2003 57
2004 48
2005 76
2006 63
2007 58
2008 54
2009 49
2010 41
2011 54
2012 51
2013 55
2014 52
2015 36
2016 27
2017 31
2018 27
2019 16
2020 0
Text availability
Article attribute
Article type
Publication date

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2,062 results
Results by year
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