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

Year Number of Results
1966 2
1967 4
1968 2
1969 2
1970 4
1971 4
1972 5
1973 8
1974 8
1975 10
1976 3
1977 7
1978 6
1979 6
1980 9
1981 7
1982 6
1983 2
1984 2
1985 5
1986 7
1987 9
1988 4
1989 5
1990 5
1991 11
1992 9
1993 8
1994 6
1995 6
1996 8
1997 7
1998 9
1999 12
2000 26
2001 41
2002 35
2003 59
2004 74
2005 59
2006 69
2007 87
2008 71
2009 81
2010 106
2011 100
2012 118
2013 177
2014 238
2015 289
2016 285
2017 189
2018 167
2019 116
2020 11
Text availability
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Article type
Publication date

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2,404 results
Results by year
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