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Results by year

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

Year Number of Results
1960 1
1962 1
1979 1
1980 1
1981 2
1982 1
1983 2
1984 1
1985 1
1986 5
1987 3
1988 4
1989 7
1990 4
1991 3
1992 4
1993 5
1994 8
1995 13
1996 13
1997 14
1998 16
1999 16
2000 37
2001 31
2002 36
2003 40
2004 43
2005 74
2006 90
2007 73
2008 99
2009 108
2010 140
2011 142
2012 189
2013 232
2014 236
2015 288
2016 310
2017 281
2018 367
2019 385
2020 76
Text availability
Article attribute
Article type
Publication date

Search Results

3,004 results
Results by year
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