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

Year Number of Results
1964 1
1965 1
1966 1
1968 1
1969 3
1987 1
1988 3
1989 2
1990 2
1991 3
1992 3
1993 2
1994 3
1996 1
1997 1
1998 7
1999 3
2000 7
2001 9
2002 19
2003 17
2004 21
2005 30
2006 26
2007 15
2008 13
2009 21
2010 28
2011 30
2012 24
2013 22
2014 24
2015 14
2016 7
2017 9
2018 15
2019 12
2020 13
2021 13
Text availability
Article attribute
Article type
Publication date

Search Results

388 results
Results by year
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388 results
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