Worldwide, do most people use simplified or traditional Chinese writing? This can be either in the number that tend to use one over the other, or total number using each even though there will be overlaps of people who use both in different situations. If possible, does anyone have specific numbers? Are these numbers trending to exaggerate the difference or is the gap closing?
There are many resources which provide which countries/cities/areas tend to use which system. However, I'm having a surprising amount of difficult finding numbers, or even an authoritative answer on which one is more commonly used worldwide.