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

Year Number of Results
1989 1
1990 5
1991 3
1992 2
1993 2
1994 4
1995 4
1996 8
1997 7
1998 5
1999 3
2000 3
2001 3
2002 15
2003 23
2004 12
2005 6
2006 10
2007 13
2008 15
2009 11
2010 9
2011 13
2012 10
2013 7
2014 7
2015 11
2016 12
2017 18
2018 10
2019 11
2020 10
2021 4
Text availability
Article attribute
Article type
Publication date

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233 results
Results by year
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233 results
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