This study is based on combined results of three authoritative research publishers' studies, each concentrating on quality of life; The publishers are the Numbeo, the Social Progress Imperative, and Nationmaster;
Winner in each of the three studies gained bonus 20 points, the second 19, etc.. Then each country's points in the three studies were combined - giving the results.
If a nation has gained e.g. 34 bonus points, it does not mean the quality of life would be two times so good as in a country with 17 bonus points; The points merely helped calculating the order of countries, nothing more;