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

Year Number of Results
1951 1
1972 2
1974 2
1980 2
1983 1
1988 1
1990 1
1992 2
1993 4
1994 7
1995 5
1996 3
1997 7
1998 4
1999 2
2000 4
2001 5
2002 6
2003 8
2004 7
2005 5
2006 8
2007 9
2008 10
2009 11
2010 15
2011 14
2012 15
2013 13
2014 9
2015 8
2016 15
2017 13
2018 18
2019 10
2020 8
2021 8
Text availability
Article attribute
Article type
Publication date

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237 results
Results by year
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237 results
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