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

Year Number of Results
1964 30
1965 149
1966 309
1967 423
1968 601
1969 730
1970 808
1971 1045
1972 1144
1973 1298
1974 1296
1975 1279
1976 1280
1977 1291
1978 1278
1979 1362
1980 1502
1981 1452
1982 1429
1983 1548
1984 1651
1985 1505
1986 1531
1987 1441
1988 1414
1989 1452
1990 1457
1991 1384
1992 1351
1993 1353
1994 1229
1995 1173
1996 1134
1997 1169
1998 970
1999 979
2000 1009
2001 971
2002 874
2003 808
2004 822
2005 858
2006 783
2007 818
2008 772
2009 769
2010 868
2011 829
2012 834
2013 706
2014 680
2015 708
2016 646
2017 575
2018 576
2019 333
2020 22
Text availability
Article attribute
Article type
Publication date

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54,983 results
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