However, average figures mask large variations that exist at the national and subnational levels, which raises concerns about realizing Goal 10 on reducing inequality. For example, those from the lowest wealth quintile are overrepresented in out-of-school populations, in the Lao People's Democratic Republic, this quintile has a rate of 28 per cent, while that for the highest wealth quintile is a mere 3 per cent This imposes large costs. For example, the postponement of marriage and child bearing, with smaller family sizes, is known to have a positive impact on human capital formation, such as investments in education and being able to address gender inequities, as covered by Goal 5 (Gender Equality).