Brave guy. (In Keith's link.) But I don't think 6.9 per cent (which is actually less than 7 per cent) is very significant given that more than 45 per cent of the population was catholic and that Westminster was desperate to push the ratio up. (Hence Flanagan and others being appointed to some of the top jobs in public service.)
Also I am not persuaded by your theory that numbers declined either after anti-discrimination measures were introduced or in the early 1970s. Catholic antagonism towards the RUC existed well before the troubles.

For the record I am not sure that anyone posting in this thread lives in Northern Ireland. For my part I live in Nottinghamshire, though I have been visiting Ireland since 1969 and lived near Belfast through the worst years of the troubles (1971 to 1982). I don't like being assigned ownership of any violent gang, there or anywhere else.