MEDLINE® Citation Counts by Year of Publication
MEDLINE consists of completed citations indexed with MeSH® (Medical Subject Headings®).
| Years of publication | Total # Citations | # Citations Published in US | % Citations Published in US |
|---|---|---|---|
| 2011* | 736,191 | 324,046 | 44% |
| 2010 | 828,527 | 351,484 | 42% |
| 2009 | 791,388 | 340,028 | 43% |
| 2008 | 765,837 | 333,708 | 44% |
| 2007 | 728,929 | 317,319 | 44% |
| 2006 | 693,924 | 305,295 | 44% |
| 2005 | 649,858 | 291,168 | 45% |
| 2004 | 594,962 | 273,269 | 46% |
| 2003 | 557,756 | 260,864 | 47% |
| 2002 | 526,578 | 246,601 | 47% |
| 2001 | 508,486 | 239,971 | 47% |
| 2000 | 486,856 | 229,953 | 47% |
| 1999 | 458,717 | 217,252 | 47% |
| 1998 | 446,874 | 211,425 | 47% |
| 1997 | 432,050 | 205,511 | 48% |
| 1996 | 421,841 | 200,034 | 47% |
| 1995 | 416,494 | 198,013 | 48% |
| 1994 | 407,363 | 191,720 | 47% |
| 1993 | 398,149 | 185,014 | 46% |
| 1992 | 391,855 | 179,337 | 46% |
| 1991 | 388,830 | 173,924 | 45% |
| 1990 | 388,215 | 169,364 | 44% |
| 1989 | 381,455 | 162,346 | 43% |
| 1988 | 365,671 | 155,188 | 42% |
| 1987 | 348,033 | 146,129 | 42% |
| 1986 | 330,483 | 138,698 | 42% |
| 1985 | 318,112 | 131,698 | 41% |
| 1984 | 307,951 | 127,293 | 41% |
| 1983 | 299,077 | 122,840 | 41% |
| 1982 | 285,280 | 116,181 | 41% |
| 1981 | 274,548 | 109,720 | 40% |
| 1980 | 272,588 | 107,595 | 39% |
| 1979 | 274,304 | 106,912 | 39% |
| 1978 | 265,583 | 101,080 | 38% |
| 1977 | 255,860 | 95,938 | 37% |
| 1976 | 249,371 | 91,617 | 37% |
| 1975 | 244,348 | 87,288 | 36% |
| 1974 | 230,227 | 80,896 | 35% |
| 1973 | 226,494 | 77,474 | 34% |
| 1972 | 222,518 | 72,806 | 33% |
| 1971 | 218,048 | 70,024 | 32% |
| 1970 | 212,752 | 67,166 | 32% |
| 1969 | 210,911 | 66,993 | 32% |
| 1968 | 204,071 | 63,842 | 31% |
| 1967 | 187,111 | 58,587 | 31% |
| 1966 | 175,283 | 55,537 | 32% |
| 1965** | 171,864 | 53,668 | 31% |
| 1964** | 156,565 | 47,778 | 31% |
| 1963** | 138,413 | NA | NA |
| 1962** | 113,073 | NA | NA |
| 1961** | 100,842 | NA | NA |
| 1960** | 94,449 | NA | NA |
| 1959** | 87,027 | NA | NA |
| 1958** | 78,846 | NA | NA |
| 1957** | 81,407 | NA | NA |
| 1956** | 78,497 | NA | NA |
| 1955** | 80,291 | NA | NA |
| 1954** | 79,082 | NA | NA |
| 1953** | 83,933 | NA | NA |
| 1952** | 86,874 | NA | NA |
| 1951** | 91,467 | NA | NA |
| 1950** | 78,778 | NA | NA |
| 1949** | 42,207 | NA | NA |
| 1948** | 30,891 | NA | NA |
| 1947** | 28,871 | NA | NA |
| Pre-1947** | 30,219 | NA | NA |
| 1964-2011 Subtotals | 18,218,944 | 7,786,696 | 43% |
| Totals*** | 19,630,233 | ——— | ——— |
|
*Searches were done in PubMed® on May 14, 2012. **As of December 2006, OLDMEDLINE subset citations that have all of their original subject terms mapped to current MeSH are included in MEDLINE. There are more citations in PubMed with these older publication dates; some are OLDMEDLINE status, but some are PubMed status or "as supplied by publisher" status. ***PubMed includes both the print and electronic publication dates in a publication date search; therefore, citations may be counted under more than one year. The totals do not include these duplicates. Notes: - Any search repeated on a later day may yield different results (typically higher numbers, as NLM may have processed more completed citations for various reasons, e.g., time lag in receipt, or a new journal for indexing going back to volume 1, or data from back issues such as those deposited in PubMed Central, or from other sources). - Counts are limited to the MEDLINE subset [sb] of PubMed and do not include out-of-scope citations. To search PubMed for MEDLINE excluding OLDMEDLINE subset citations, add NOT jsubsetom to your search. - Country of publication means the country where the journal was published. These data are available for the OLDMEDLINE subset only for the years 1964-65. |
