Via this Greg Weeks post, which you should check out for the LatAm-centric commentary on the index.
Find the thing here and on inspection, it strikes me as superior to the normal sort of country life-quality ranking tables you get from world bodies. You can even play with the ratios of the ranking criteria to see how things are affected. Very good and what’s more, I generally agree with the way in which LatAm states are ranked in the list.