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

Year Number of Results
1938 1
1945 27
1946 106
1947 128
1948 105
1949 99
1950 165
1951 225
1952 209
1953 240
1954 215
1955 274
1956 273
1957 273
1958 266
1959 254
1960 256
1961 327
1962 306
1963 560
1964 880
1965 873
1966 863
1967 982
1968 1095
1969 1063
1970 1168
1971 1214
1972 1561
1973 1679
1974 1452
1975 1405
1976 1455
1977 1534
1978 1651
1979 1636
1980 1329
1981 1469
1982 1443
1983 1570
1984 1604
1985 1801
1986 1979
1987 2068
1988 2291
1989 2464
1990 2426
1991 2521
1992 2474
1993 2718
1994 2855
1995 2914
1996 2963
1997 3016
1998 2882
1999 3111
2000 3352
2001 3491
2002 3804
2003 3868
2004 4216
2005 4724
2006 5273
2007 6021
2008 6419
2009 6705
2010 7686
2011 8456
2012 9239
2013 9930
2014 11310
2015 11644
2016 11428
2017 11826
2018 12526
2019 13677
2020 15456
2021 15628
2022 14210
2023 12538
2024 14284
2025 8501
2026 1

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Page 1
Assessing the Impact of Early Learning Programs in Africa.
Gove A, Brunette T, Bulat J, Carrol B, Henny C, Macon W, Nderu E, Sitabkhan Y. Gove A, et al. New Dir Child Adolesc Dev. 2017 Dec;2017(158):25-41. doi: 10.1002/cad.20224. New Dir Child Adolesc Dev. 2017. PMID: 29243385 Free PMC article. Review.
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