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

Year Number of Results
1976 58
1977 67
1978 96
1979 166
1980 193
1981 227
1982 247
1983 252
1984 267
1985 258
1986 264
1987 348
1988 342
1989 397
1990 423
1991 398
1992 512
1993 581
1994 544
1995 591
1996 602
1997 616
1998 612
1999 924
2000 645
2001 574
2002 601
2003 730
2004 665
2005 931
2006 1075
2007 968
2008 1044
2009 1108
2010 1080
2011 1009
2012 929
2013 1019
2014 996
2015 1073
2016 859
2017 862
2018 783
2019 733
2020 187
Text availability
Article attribute
Article type
Publication date

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24,303 results
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