Number of US versus non-US countries represented for Support reply data: April 01 2012 to April 01 2013
A support ticket can have one or more replies. A reply can have one or more users. Hence there can be one or more countries represented in a single reply. Undetermined/misc data = foreign addresses with no identifying domain convention (e.g., 'ac'), etc.
Note: The chart above is interactive - click on the pie pieces to see the data.