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Results by year

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

Year Number of Results
1963 41
1964 50
1965 58
1966 68
1967 56
1968 49
1969 56
1970 55
1971 52
1972 41
1973 53
1974 79
1975 84
1976 48
1977 52
1978 60
1979 53
1980 37
1981 40
1982 28
1983 29
1984 6
1987 33
1988 32
1989 43
1990 36
1991 30
1992 35
1993 36
1994 53
1995 53
1996 37
1997 44
1998 38
1999 337
2000 348
2001 316
2002 317
2003 435
2004 455
2005 521
2006 659
2007 609
2008 692
2009 641
2010 730
2011 728
2012 716
2013 717
2014 773
2015 751
2016 681
2017 727
2018 767
2019 807
2020 1229
Text availability
Article attribute
Article type
Publication date

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