EDU versus non-EDU institutions represented for tiggelam mailing list post/subscription/unsubscription data: Apr 1 2010 to Mar 31 2011

EDU institutions = US and international degree granting universities, colleges and technical schools and EDU entities. Undetermined/misc data = foreign addresses with no identifying domain convention (e.g., 'ac'), etc.

Note: The chart above is interactive - click on the bars to see the data.