Socio-economic background is more strongly related to performance than gender. In all countries with available data, adults with at least one tertiary-educated parent have higher numeracy skills than those whose parents have not attained this level of education (Table 2). Related to SDG Target 4.4 on Skills for Work, Global Indicator 4.4.1 measures the "Proportion of youth and adults with information and communications technology (ICT) skills, by type of skill.” This indicator has been developed according to the definition of the International Telecommunication Union in the framework of the Partnership on Measuring ICT for Development (ITU, 2014(9]).