"The WISP study for the 1990s has just been published, with Sweden and Denmark sharing first place, just ahead of Norway - a sweeping
victory for the Scandinavian way of life, with Nordic neighbor Finland and the central European nations following after."
"measures the quality of life in 163 nations using 40 different social indicators"
Apparently Swedes and Danes are the most content people on earth about their quality of life.
It's just a short article this and notes that USA ends up on 27th place and "Afghanistan and nine African nations came bottom of the study."
I can't find the homepage for this research other than the news article.