Huh... Finland is #1 in happiness but has the third highest suicide rate in Western Europe (behind Belgium, France, and Switzerland) [1]. Belgium is medium happy, but has the 15th highest suicide rate in the world, substantially above the US. The UK is second lowest happiness, but has one of the lowest suicide rates in Europe. The difference in happiness between Finland and the US appears huge, yet their suicide rates are similar (Finland is next after the US of the countries on the happiness list)
Suicide rates aren't everything, but they are certainly telling a very different story.
[1] https://en.wikipedia.org/wiki/List_of_countries_by_suicide_r...