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

Year Number of Results
1945 24
1946 144
1947 106
1948 90
1949 111
1950 69
1951 77
1952 21
1953 32
1954 35
1955 33
1956 27
1957 32
1958 21
1959 36
1960 63
1961 80
1962 100
1963 198
1964 297
1965 277
1966 284
1967 394
1968 379
1969 328
1970 359
1971 406
1972 389
1973 532
1974 498
1975 331
1976 241
1977 236
1978 243
1979 203
1980 184
1981 189
1982 215
1983 230
1984 251
1985 229
1986 236
1987 209
1988 233
1989 239
1990 312
1991 318
1992 344
1993 349
1994 305
1995 226
1996 258
1997 275
1998 270
1999 288
2000 351
2001 307
2002 291
2003 387
2004 455
2005 479
2006 485
2007 538
2008 516
2009 514
2010 574
2011 635
2012 676
2013 694
2014 546
2015 560
2016 477
2017 431
2018 359
2019 386
2020 291
2021 244
2022 158
2023 100
2024 49

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20,798 results

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Fluid intelligence: A brief history.
Kent P. Kent P. Appl Neuropsychol Child. 2017 Jul-Sep;6(3):193-203. doi: 10.1080/21622965.2017.1317480. Epub 2017 May 16. Appl Neuropsychol Child. 2017. PMID: 28506124 Review.
The Flynn effect: a meta-analysis.
Trahan LH, Stuebing KK, Fletcher JM, Hiscock M. Trahan LH, et al. Psychol Bull. 2014 Sep;140(5):1332-60. doi: 10.1037/a0037173. Epub 2014 Jun 30. Psychol Bull. 2014. PMID: 24979188 Free PMC article. Review.
20,798 results
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