The back to education scheme (BTEA) covers a large range of full-time courses of education in approved colleges spanning basic foundation courses to third level courses across all disciplines, including,inter alia, theology mentioned in the question. Courses may be pursued up to and including a higher diploma level in any discipline [level 8 in the national framework of qualifications (NFQ)] or to a professional diploma in education (primary and secondary teaching; level 8 in NFQ).
Data on individuals who availed of BTEA to study theology is not available.