Abundant petroleum and foreign private investment have helped make Gabon one of the most prosperous countries in Sub-Saharan Africa, with the fifth highest HDI in the region (after Mauritius, Seychelles, Botswana and South Africa) and the fifth highest GDP per capita (PPP) in all of Africa (after Seychelles, Mauritius, Equatorial Guinea and Botswana). Its GDP grew by more than 6% per year from 2010 to 2012. However, because of inequality in income distribution, a significant proportion of the population remains poor.