Ireland fact of the day

…one statistic stands out from a census comparison from the first decade of the twenty-first century.  Just 2.1 percent of the population in Northern Ireland were born in the South, and just 1.3 percent living in the South were born in the North.

And that is with rights of free migration.  That is from Brendan O’Leary, A Treatise on Northern Ireland, volume 3, Consociation and Confederation, a very good series of books I might add.