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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
1982 2
1983 4
1984 5
1986 4
1987 3
1988 4
1989 1
1990 1
1992 4
1993 3
1994 7
1995 4
1996 7
1997 9
1998 13
1999 21
2000 15
2001 13
2002 15
2003 15
2004 15
2005 35
2006 30
2007 31
2008 42
2009 48
2010 54
2011 70
2012 90
2013 102
2014 128
2015 148
2016 145
2017 159
2018 203
2019 223
2020 287
2021 333
2022 295
Text availability
Article attribute
Article type
Publication date

Search Results

2,317 results
Results by year
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2,317 results