Sub-Saharan Africa 6 574 participants East Asia & the Pacific 2 516 participants Europe & Central Asia 9 723 participants South Asia 4 274 participants Nota bene Nota bene NB: To make analysis and comparison easier, we have grouped countries together according to the nomenclature of the different regions used by the World Bank. However, not all regions have the same weight in the overall data as others and, within some regions, certain countries and sub-regions have varying levels of representation. This is particularly the case for Europe and Central Asia, in which Western Europe, Northern Europe, and Southern Europe are over-represented (9,313 participants) in comparison with Eastern Europe and Central Asia (348 participants). We find the same situation in East Asia and Pacific, with the countries of East Asia (particularly China) featuring much more strongly than Oceania.