Shall we take a look at the current situation in an eye-pleasing way? Of course! You can view our interactive map right here. You can view maps with colors corresponding to the years of EM recognition for each country in the world (darker the color, earlier the date) in Figure 1. You can also view continental maps for Africa, Asia, Americas, Europe and Oceania in Figures 2, 3, 4, 5, 6, respectively.