 Due to their career and family obligations, supernumeraries are not as available to the organization as the other types of faithful, but they typically contribute financially to Opus Dei, and they lend other types of assistance as their circumstances permit.Numeraries, the second largest type of the faithful of Opus Dei, comprise about 20% of total membership.Numeraries are celibate members who give themselves in "full availability" ("plena disponibilitas") for the official undertakings of the Prelature.