OK, this has gone on long enough. The answer I was looking for is Malta. This came from the same "mostest" and "leastest" website as my previous "France covers the most time zones" and "Liechtenstein make the most false teeth" questions. Presumably a combination of emigration to Commonwealth countries and working elsewhere in the European Union.

I reckon any of the answers given is equally plausible so anyone who has a good question please post it.