Consequently, the relative disparities have not only persisted over time —in half of the countries examined, they have become more pronounced (see table II. Inequalities with regard to timing may also exist, such as lower contraceptive prevalence in the first sexual encounter among less-educated women compared with those with more years of schooling. An extreme case is Haiti, where the general prevalence is very low but the rate is as high as 40% for more-educated women versus only 25% for those with no formal schooling. This suggests that they have more limited access to family planning services. In Guatemala and the Plurinational State of Bolivia, only 40% of women with no education who live in a union use contraception, compared with 70% of educated women. In Ecuador, contraceptive prevalence ranges from 50% to 80%.