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Results by year

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

Year Number of Results
1959 1
1976 1
1977 1
1979 5
1980 1
1981 1
1984 3
1985 1
1986 1
1987 1
1988 2
1989 8
1990 5
1991 6
1992 8
1993 11
1994 11
1995 8
1996 8
1997 12
1998 12
1999 13
2000 13
2001 21
2002 26
2003 41
2004 54
2005 71
2006 100
2007 131
2008 153
2009 88
2010 41
2011 39
2012 42
2013 53
2014 43
2015 38
2016 36
2017 38
2018 28
2019 21
2020 4
Text availability
Article attribute
Article type
Publication date

Search Results

1,111 results
Results by year
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