A HDI below 0.5 is considered to represent "low development". All 22 countries in that category are located in Africa. The highest-scoring Sub-Saharan countries, Gabon and South Africa, are ranked 119th and 121st, respectively. Nine countries departed from this category this year and joined the "medium development" group.
Under what number does a country need to fall in order to be considered a "low development" country? On which continent are all 22 of the low development countries located? What is Gabon's ranking? What is South Africa's ranking? What are the two highest ranking Sub-Saharan countries?