I think they just make a guess don't you * Stansgran*? It's not as if anyone has done a censor is it in these primitive countries where they're all still living in grass huts or caves
Aka, the world was a lot smaller then, or at least the world that mattered to Caesar Augustus. Did all the Roman soldiers that were living in Britain have to go back to where they were born? If you look at the page directed to at the top, there is a link to the rest of the statistics. Great Britain is 22nd. Scrolling down shows you how they collect and update, etc.
Jen I was teasing! Anyway when I looked at that clock thing I was overwhelmed by an urge to just sit and watch it tick round and round and round and round.....think I've a touch of OCD
You're obviously a lateral thinker Jen that would never have occurred to me. But can you imagine the outcry and chaos if that was to be tried in this century? Motorway systems clogged up, delays at airports and ferry terminals, mass migration... Poor old Mary, she was in an advanced state of pregnancy too.