42 \ Global Youth Development Index and Report 2016 exceptional score in a particular domain, regardless of the country’s overall YDI score. Indicator weights are listed in the methodology in Table A2.8 of Annex 2. There is not a single country that appears in the top ten rankings for all the five domains of the YDI. The Netherlands is the most consistent top ten performer across domains, as it is in the top ten for three of the five domains. Canada, Costa Rica, Denmark, Germany, Iceland and Japan all rank in the top ten for two domains each and are all ranked in the top 25 countries in the overall YDI rankings. Eurasia, Central America and the Caribbean, and Asia-Pacific. South Asia and Sub-Saharan Africa, which together account for just over 40 per cent of the world’s youth population, are the only regions whose average scores in the Education domain are below the global average. Between 2010 and 2015, domain scores have changed in different directions and at different rates. These changes have been more pronounced in some regions than others (Figure 2.11). Table 2.6 lists countries with the highest and lowest ranks in the Education domain, and compares them with their overall rank in the 2016 YDI. Except Japan, all top ten countries are in Europe. In contrast, the ten lowest-ranked countries are all from SubSaharan Africa. Four countries that rank among the top ten in the Education domain are also ranked in the top ten in the overall YDI. Similarly, four of the lowest-ranked countries in this domain are also in the same category in the overall YDI. 2.4.1 Education 2.4.2  Health and Well-being This domain in the YDI captures the progress the world has made in improving young people’s access to education and their familiarity with information and communication technologies. Between 2010 and 2015, Education registered the lowest improvement among all the domains, at 2 per cent. Except South Asia and Sub-Saharan Africa, where moderate improvements were recorded, scores for other regions in this domain barely moved. The Health and Well-being domain seeks to measure access to, and quality of, healthcare available to young people in every country, as well as the level of youth well-being. North America and Europe are leading the world in this YDI domain (see Section 2.5), with nearly 100 per cent youth literacy and secondary enrolment rates, followed by South America, Russia and Between 2010 and 2015, the global Health and Well-being average score improved by approximately 3 per cent, mostly because of progress in Sub-Saharan Africa, which experienced a rise of nearly 12 per cent in its Health and Wellbeing score. For the world on the whole, moderate improvements were recorded in the past five years for the indicators relating to youth mortality, alcohol abuse and mental disorders. Drug abuse was the Table 2.6  Highest and lowest-ranked countries in the Education domain compared with their overall 2016 YDI score Ten highest-scoring countries Education rank Overall YDI rank Ten lowest-scoring countries Education rank Overall YDI rank Mali 174 174 Netherlands 1 6 Finland 2 25 Mauritania 175 172 Latvia 3 30 South Sudan 176 160 Denmark 4 2 Liberia 177 119 Estonia 5 47 Côte d’Ivoire 178 181 Iceland 6 25 Guinea 179 155 Japan 7 10 Chad 180 182 Germany 8 1 Burkina Faso 181 155 Lithuania 9 78 Central African Republic 182 183 10 16 Niger 183 180 Norway