I browsed the World Happiness Report 2016 released today and I must say, for all the indicators used, you just don’t measure happiness. Sure, you measure GDP, life satisfaction etc., but not happiness.
Because things are a bit subjective here. Last time I went to Switzerland, a man jumped in front of my train. I am not saying it happens on a daily basis, but some countries in top 5 do have an exceptionally high suicide rate (here’s an extended piece on this paradox).
So, now we’re reading this official report in which apparently everyone is doing fine, roses are red and spring is in full bloom.
Communication for Development of Ideas 
Agreed. It’s an emotional state. That cannot possibly be calculated statistically.