In September 2016, the Lancet provided an analysis of the health-related Sustainable Development Goals (SDGs) in 188 countries. To allow for easier comparison, an indexed score (SDG Index) was created for the 33 health-related SDG indicators based on the Global Burden of Diseases, Injuries, and Risk Factors Study 2015. Progress towards each indicator was scaled from 0 (worst observed value between 1990 and 2015) to 100 (best observed). As a result, Iceland tops the list with a score of 85. The lowest-scoring nation was the Central African Republic, at 20.