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 8
1946 12
1947 15
1948 15
1949 9
1950 1
1951 40
1952 102
1953 137
1954 184
1955 163
1956 160
1957 174
1958 147
1959 141
1960 124
1961 127
1962 129
1963 12
1964 22
1965 96
1966 865
1967 1489
1968 1852
1969 2133
1970 2247
1971 2545
1972 2657
1973 2561
1974 2610
1975 2301
1976 2141
1977 1878
1978 1783
1979 1881
1980 1897
1981 1760
1982 1774
1983 1881
1984 2044
1985 2131
1986 1994
1987 2009
1988 1929
1989 1940
1990 1962
1991 1959
1992 1865
1993 1970
1994 1948
1995 1771
1996 1722
1997 1836
1998 1980
1999 2021
2000 2111
2001 2268
2002 2368
2003 2644
2004 2586
2005 2989
2006 3183
2007 3172
2008 3020
2009 3194
2010 3572
2011 3861
2012 4088
2013 4073
2014 4064
2015 4030
2016 4013
2017 3923
2018 3920
2019 3755
2020 3136
2021 2176
2022 1476
2023 1154
2024 514

Text availability

Article attribute

Article type

Publication date

Search Results

134,034 results

Results by year

Filters applied: . Clear all
Page 1
134,034 results
You have reached the last available page of results. Please see the User Guide for more information.