The number of diocesan priests there fell from 136 in 1950 to 64 in 2021.
Elsewhere in Northern Ireland, the Archdiocese of Armagh has 16 seminarians, the Diocese of Derry has four, and the Diocese of Dromore has two.
The Diocese of Down and Connor has three seminarians and will soon welcome six more; it has a new bishop (Bishop Alan McGuckian, SJ), who was appointed in February.