I don't have the numbers of people who have emigrated from NI to the Republic. But I would suggest many more people have emigrated from NI to the Republic than vice versa in the past 30 years, largely to get away from the Troubles. This will have been particularly true in the past 10 years, when the Republic's economy took off, while the North's economy largely stagnated because of the destruction to infrastructure from rioting, that sort of thing.