I was interested about the number and geographical distribution or SC users and @sujato kindly granted me access to the SC Google Analytics account. Since the data only went back as far as September 2014, I ended up with the following reports:
SuttaCentral users by continent, sub continent and country in 2015 (only full year available): sc_users_2015.pdf (333.9 KB)
SC users by continent, sub continent and country in the first five months of 2015 compared to the first five months of 2016: sc_users_2015_vs_2016.pdf (83.6 KB)
With metta.