Key MEDLINE® Indicators
FY2017 | % Change | FY2016 | % Change | FY2015 | % Change | FY2014 | % Change | FY2013 | % Change | |
---|---|---|---|---|---|---|---|---|---|---|
MEDLINE Citations Indexed | 813,598 | -6.5% | 869,666 | +8% | 806,326 | +5% | 765,850 | +4% | 734,052 | -3.5% |
MEDLINE/PubMed® Searches | 3.3 Billion | +6.4% | 3.1 Billion | +14% | 2.8 Billion | +4% | 2.7 Billion | +8% | 2.5 Billion | +14% |
Sub-Total Web/Interactive | 846Million | -0.8% | 853 Million | -6% | 910 Million | +1% | 900 Million | -3% | 932 Million | 0% |
Sub-Total Script/E-Utilities | 2.5 Billion | +13.6% | 2.2 Billion | +21% | 1.9 Billion | +6% | 1.8 Billion | +13% | 1.6 Billion | +23% |
MEDLINE Journal Titles | 5,617 | -0.1 % | 5,623 | +0.1% | 5,618 | -0.5% | 5,647 | +0.1% | 5,640 | +0.1% |
Index Medicus Journal Titles | 5,150 | +0.3 % | 5,136 | +0.3% | 5,123 | +0.1% | 5,118 | +1% | 5,067 | +0.8% |
Total Citation Data Creation2 | n/a | n/a | 1,020,678 | -10% | 879,709 | -10% | 981,783 | +6% | 926,479 | +6% |
OCRed Citations | n/a | n/a | 39,051 | -21% | 43,864 | -21% | 55,222 | -8% | 60,019 | -4% |
Citations Received as XML2 | n/a | n/a | 981,627 | -10% | 835,845 | -10% | 926,561 | +7% | 866,460 | +7% |
Retraction Notices | n/a | n/a | 641 | +41% | 666 | +41% | 473 | +15% | 410 | +18% |
Retracted Articles | n/a | n/a | 664 | +37% | 684 | +37% | 500 | +75% | 467 | +25% |
Partial Retraction1 Notices | n/a | n/a | n/a | n/a | 4 | +400% | 0 | -100% | 3 | +200% |
Partially Retracted1 Articles | n/a | n/a | n/a | n/a | 4 | +400% | 0 | -100% | 3 | +200% |
Errata2 | n/a | n/a | 8,992 | -27% | 12,344 | +29% | 9,602 | +5% | 9,178 | +13% |
Comments2 | n/a | n/a | 47,906 | -9% | 52,921 | -7% | 56,652 | +16% | 48,714 | +31% |
Gene Indexing | 88,397 | +2.2% | 86,458 | +3% | 83,734 | +7% | 78,491 | -8% | 85,429 | -4% |
See also additional MEDLINE statistics.
The U.S. Government Fiscal Year (FY) runs from October 1 - September 30.
Not all footnotes apply to archived years.
- NLM began to report partial retractions separately in December 2006; discontinued in September 2016.
- Due to a system reinvention implemented in FY2017, this data is not yet available.
Last Reviewed: August 22, 2018