On average across the OECD, 76% of children in this age-group participated in all early education services in 2008, up from 64% in 1998, and increases in participation were largest in Chile, Mexico, Norway and Sweden. Cross-county variation in participation remains significant: from below 40% in Korea and TUrkey to over 95% in Belgium, France, Iceland, Italy and Spain (OECD, 2010b). Childcare enrolment rates refers to estimates on childcare enrolment rates of children aged < 3 and children aged 3-5, data refer to 2005 for the United States and 2009 for Mexico. Numbers do not reflect intensity of use: each child is counted regardless of the number of hours of participation per week. For comparative purposes, indicators were adjusted for cross-national differences in the compulsory age of entry into primary school. For example, in Nordic countries, where children enter primary school at age 7, expenditure on 6-year-olds was excluded from these figures.