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MEDLINE® Data Entry by Fiscal Year

Beginning in 1997, the National Library of Medicine® (NLM®) has managed a dramatic shift in how citation data first enter the MEDLINE process: from double keyboarding citations by hand; to scanning and using optical character recognition (OCR); to importing records supplied by publishers in eXtensible Markup Language (XML) format. The data below reflect citations created (not necessarily indexed) for MEDLINE in each fiscal year.

medline data entry by fiscal year 1995 to 2012

 

Fiscal Year Total Citations Entered Keyboarded1 Citations % KeyboardedOCRed Citations % OCRedCitations Received Electronically via XML % XML
2013 926,479 0 0% 60,019 6% 866,460 94%
2012 875,576 0 0% 62,562 7% 813,014 93%
2011 845,948 0 0% 71,145 8% 774,804 92%
2010 767,470 0 0% 77,309 10% 690,161 90%
2009 748,479 0 0% 87,970 12% 660,509 88%
2008 720,097 0 0% 94,711 13% 625,386 86%
2007 685,134 0 0% 105,841 15% 579,293 85%
2006 669,124 0 0% 122,106 18% 547,018 82%
2005 639,000 0 0% 152,000 24% 487,000 76%
2004 584,000 55,000 9% 98,000 17% 431,000 74%
2003 535,000 101,000 19% 109,000 20% 325,000 61%
2002 519,000 114,000 22% 113,000 22% 292,000 56%
2001 472,000 124,000 26% 129,000 27% 219,000 46%
2000 488,000 156,000 32% 146,000 30% 186,000 38%
1999 453,000 198,000 44% 151,000 33% 104,000 23%
1998 434,000 260,000 60% 130,000 30% 44,000 10%
1997 496,000 434,000 88% 62,000 13% 0 0%
1996 336,0002 336,000 100% 0 0% 0 0%
1995 410,5593 410,559 100% 0 0% 0 0%

The U.S. Government Fiscal Year runs from October 1 - September 30.

Percentage may not add to 100% because of rounding.

1Keyboarding ceased as a method of data entry in June 2004.

2There was a data entry and concomitant indexing backlog resulting from the General Services Administration Board of Contract Appeals' suspension of the NLM editing and data entry contract from late February 1996 to late April 1996. The large backlog was eliminated in early April 1997. This caused fewer records to be added during FY 1996 and a greater number added in FY 1997.

3Number derived from citations present in the database in 2007 that are tagged as being created during FY 1995; not the original processing statistic.