The actual cost of care of the groups covered through ACE, however, has not been quantified. Hence, the gap between the minimum average contribution used by the CCSS (to determine FODESAF’s transfer) and the actual cost of care is unknown. This rate dropped when looking at the most vulnerable subgroups: only 45% of the extreme poor and 35% of the lowest two quintiles of the population were covered by ACE, suggesting gaps in coverage. Questions regarding sustainability also arise.