Social Indicators at the population level: one row per country, year, indicator and source survey, aggregated across every disaggregation dimension — sex, area, income quintile, education level, age, ethnicity, disability and migration status each carry the value Total. Each row gives the indicator's value and, where the survey supports it, the standard error, coefficient of variation and sample size behind it, with the ISO 3166-1 alpha-3 country code.