In most single-parent families, the parent is the mother. In 2016, the number of 6–12 year olds living mostly with their fathers was between 5% and 36% in the many OECD countries. It was highest in Belgium (17%), Iceland (19%), Slovenia (20%), France (22%), Norway (23%) and Sweden (36%). It was the lowest in Lithuania (4%), Ireland (5%), Poland (5%), Estonia (7%), Austria (7%) and the United Kingdom (8%). In the United States it was 15%.