this is why you dont trust the internet

It doesn't mean that kind of happiness. In Finland there I 2 words for it, and they mean different things. They meant "onnellinen" which means things are very good (no war, clear water, food, etc. Yes, depression. But many people are happy. 5,6%? Wait, that's how much of Finland's population is Swedish. Lol. Swedes are depressed. Lol

In reality, these sorts of stats are heavily influenced by identification and treatment systems. Which can, in turn, be heavily influenced by perceptions and availability of services.