It is usually calculated for the population aged 6 to 14 years, but given the high rates of school attendance in most countries in the region, the age bracket has been expanded on this occasion to 6 to 17 years. As regards data problems, in some countries, the population under 7 years of age is excluded and also in some surveys, enrolment is used as the criterion instead of actual attendance. In line with the usual practice in the research used in the multidimensional approach (see boxes 1.3 and 1.5), the same weighting is assigned for the dimensions used in this exercise, since no agreement was reached on whether to assign them more or less importance.