Las Vegas is such an awesome city with so many different casinos. The hole city and county lives of the gambling revenues. Unfortunately many other countries don't have such a centralised gambling city. Except maybe Macau there are not really other places to compare. In southern oder Middle America gambling is also important but it doesn't happen so much in casinos. People tend to invest there money more in lotteries. Also scratch cards are very big in these countries.
That's the advantage that Vegas has compared to other countries, most of the time, the casinos are scattered across the city, but in Vegas, everything you can see is all about the casino, you can forget almost everything and just have fun which really attracts many tourists to visit and play. This makes them economically stable since there are huge taxes coming from gambling casinos. But with the current condition we are in right now, it is advisable to pursue gambling at home such as playing online through provably fair sites. That also infer that the statistics for the biggest countries where the players gamble the most will not rely on physical casinos, but from the IP addresses of the verified gamblers coming from various countries.