Looking at the comparison in the report I see no correlations between the health care system and the amount of self-employment. There does seem to be a strong

Looking at the comparison in the report I see no correlations between the health care system and the amount of self-employment. There does seem to be a strong inverse correlation between self-employment and GDP-per-capita, with Norway Luxembourg and US being at the bottom and Spain, Italy and Greece on top. The only thing this report suggests is that a strong economy has relatively large businesses.