Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation

Search Page

Filters

My NCBI Filters

Results by year

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

Year Number of Results
1946 2
1947 1
1948 2
1949 2
1951 13
1952 19
1953 17
1954 15
1955 17
1956 14
1957 13
1958 10
1959 8
1960 1
1961 2
1962 3
1963 17
1964 19
1965 89
1966 196
1967 361
1968 482
1969 718
1970 825
1971 974
1972 1182
1973 1282
1974 1422
1975 1066
1976 783
1977 1028
1978 941
1979 992
1980 897
1981 787
1982 997
1983 1249
1984 1134
1985 1142
1986 1216
1987 1325
1988 1445
1989 1511
1990 1767
1991 1755
1992 1829
1993 1831
1994 1990
1995 2040
1996 2033
1997 2024
1998 2086
1999 2082
2000 2423
2001 2518
2002 2596
2003 2843
2004 2814
2005 3206
2006 3398
2007 3302
2008 3520
2009 3530
2010 3757
2011 3966
2012 4063
2013 4127
2014 4203
2015 4252
2016 4094
2017 3940
2018 3835
2019 3816
2020 3228
2021 1906
2022 273
2023 85
2024 236

Text availability

Article attribute

Article type

Publication date

Search Results

110,776 results

Results by year

Filters applied: . Clear all
Page 1
110,776 results
You have reached the last available page of results. Please see the User Guide for more information.