Ireland has always been united, . Well at least since the pre cambrian era, as a visiting geology professor told me, with the actual join south of Annagassan. , It is only the people who are disunited. The ring of volcanoes, around Newry which give us the attractive mournes, resulted from the unification process.(.. You couldn't make it up. ,) ..
What is very worrying about your statistic is that a sizable fraction of the UK population, would jettison the UK in order to further BREXIt. What next, since Scotland voted remain would it then be sacrificed on the altar