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

Year Number of Results
1979 180
1980 167
1981 221
1982 208
1983 180
1984 205
1985 246
1986 270
1987 246
1988 305
1989 353
1990 260
1991 314
1992 324
1993 362
1994 434
1995 445
1996 394
1997 394
1998 429
1999 408
2000 386
2001 398
2002 423
2003 360
2004 331
2005 432
2006 452
2007 857
2008 809
2009 701
2010 729
2011 681
2012 626
2013 637
2014 611
2015 667
2016 556
2017 539
2018 588
2019 694
2020 225
Text availability
Article attribute
Article type
Publication date

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15,875 results
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