Reg Empey is the latest Unionist politician to share his thoughts on the potential outcomes of the census when it is announced on Thursday:
While this is no definitive guarantee of how people vote, it is a strong indicator. It must also be remembered that the figures refer to the whole population and not the electorate. But the figures will show a growing Catholic population, a reducing Protestant population as a percentage of the total, and a growing group described as others.
We will have to look behind the headline figures, of course, to be able to predict future trends. The statistics for births will be interesting, as these may indicate that the future growth in the Catholic population is slowing.