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Results by year

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

Year Number of Results
1957 1
1961 4
1962 2
1963 6
1964 5
1970 1
1973 1
1974 1
1975 1
1976 1
1977 1
1978 1
1979 2
1980 3
1981 6
1982 5
1983 9
1984 9
1985 7
1986 6
1987 11
1988 10
1989 16
1990 12
1991 10
1992 15
1993 18
1994 18
1995 21
1996 29
1997 33
1998 23
1999 45
2000 51
2001 43
2002 68
2003 84
2004 101
2005 120
2006 150
2007 151
2008 215
2009 236
2010 254
2011 275
2012 354
2013 457
2014 525
2015 580
2016 623
2017 700
2018 839
2019 966
2020 1197
2021 746
Text availability
Article attribute
Article type
Publication date

Search Results

8,077 results
Results by year
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