The database is updated annually, on the occasion of International Women’s Day, and its estimates are sourced from national time-use surveys, based on nationally representative samples of between 4 000 and 20 000 people. For each of the categories only primary activities are taken into account, while simultaneous or secondary activities are excluded to improve comparability across countries. In Ethiopia, for example, men spend almost twice as long on paid work or study than women, while the opposite is true for unpaid care work.