Created by the Ben O'Steen for the Open Bibiography Project Data acquired from MEDLINE/PubMed Visualisation uses The WebGL Globe
NB Only 25.4% of the institutional sources for articles have been located here so far so use your judgement - 2004 is particularly unrepresentative.
2004 2009 2010
Source of articles in PubMed/MEDLINE (NB Incomplete)
This is adapted from a Chrome Experiment