The more important thing isn't the number per say (although they should be concerned) but how they are respond to it when they find out - and willfull ignorance is the same as knowing.
If say the Catholic Church's response to their sex abuse scandal was to turn over all evidence to the authorities and maybe make own judgements in parallel to defrock or excommunicate based upon the evidence they would be morally upstanding even if their judgement differed in some cases as "not enough evidence by our standard / not enough to be illegal but violates our scriptural standards".
Because they sheltered them for decades their moral authority is a joke and all priests being pedophiles is a dark comedy cliche.
If say the Catholic Church's response to their sex abuse scandal was to turn over all evidence to the authorities and maybe make own judgements in parallel to defrock or excommunicate based upon the evidence they would be morally upstanding even if their judgement differed in some cases as "not enough evidence by our standard / not enough to be illegal but violates our scriptural standards".
Because they sheltered them for decades their moral authority is a joke and all priests being pedophiles is a dark comedy cliche.