According to the results of a national survey about EPS services conducted by the MSPS in 2014, the average of enrolees waiting more than ten days for consultation with a general doctor was 10.1% among EPS in the SR, compared to 13.3% among EPS in the CR. The MSPS estimated that the share of OOP payments in Colombia was 15.2% of the funding of the health system in 2012 (as seen in Chapter 1). While the WHO estimated that the OOP in Colombia was somewhat higher (around 17%) in 2012, it was still among the lowest in Latin America (Figure 2.1) and also lower than the OECD average of around 20%. Cost-sharing is determined both by the scheme that the person belongs to and their assessed socio-economic vulnerability, measured by an index called SISBEN. Enrolees of the SR make no co-payments for services if they belong to SISBEN 1 (most vulnerable individuals) and pay only a 5% co-insurance rate if they belong to SISBEN 2.