The source you cite doesn't support your answers. If country X has city A, with a selfies per 100,000, and city B, with b selfies per 100,000, and city C, with c selfies per 100,000, that doesn't mean that country X has a+b+c selfies per 100,000.
Haha... Philippines was the first thing I guessed after the USA and China. Pretty shocking that China gets beat out by New Zealand. I'm also surprised that the UAE and Qatar show up. Arabs can be reluctant to take selfies... or at least to publish them.