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

Year Number of Results
1979 1
1980 1
1983 2
1986 2
1987 1
1988 1
1989 2
1990 1
1991 7
1992 2
1994 3
1995 2
1996 6
1997 7
1998 2
1999 1
2000 3
2001 4
2002 3
2003 4
2004 12
2005 10
2006 9
2007 9
2008 12
2009 10
2010 17
2011 18
2012 25
2013 31
2014 45
2015 39
2016 35
2017 34
2018 33
2019 37
2020 32
2021 19
Text availability
Article attribute
Article type
Publication date

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396 results
Results by year
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396 results
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