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
1945 97
1946 605
1947 736
1948 712
1949 655
1950 1040
1951 1287
1952 1343
1953 1616
1954 1743
1955 1753
1956 1929
1957 2114
1958 2301
1959 2564
1960 2545
1961 2720
1962 3102
1963 6436
1964 9543
1965 10042
1966 11251
1967 12685
1968 14194
1969 15393
1970 15310
1971 16671
1972 18508
1973 18866
1974 19210
1975 20593
1976 20575
1977 21212
1978 22701
1979 23753
1980 25866
1981 25829
1982 26753
1983 28220
1984 29606
1985 30130
1986 31178
1987 30653
1988 31819
1989 33551
1990 34463
1991 33925
1992 34515
1993 35450
1994 36443
1995 36990
1996 36771
1997 36495
1998 36296
1999 35283
2000 35020
2001 33587
2002 33487
2003 34768
2004 35597
2005 37419
2006 38320
2007 37938
2008 38658
2009 38521
2010 40241
2011 40629
2012 41007
2013 40083
2014 39352
2015 38253
2016 36503
2017 35288
2018 34511
2019 34163
2020 33495
2021 30482
2022 25572
2023 22389
2024 8431

Text availability

Article attribute

Article type

Publication date

Search Results

1,716,717 results

Results by year

Filters applied: . Clear all
Page 1
1,716,717 results
You have reached the last available page of results. Please see the User Guide for more information.
-