Fruitcakes came to America with the European colonists, and the rising tide of emigration from Britain to New England closely mirrored an influx of cheap sugar from the Caribbean.

As for the emigration of corporate headquarters, California still leads the nation in headquarters of Fortune 500 companies, with 57.

"Fewer people are now leaving Moldova, but emigration is still high."

"Ultimately, this emigration from France constitutes a real brain-drain, as it is primarily highly educated French Muslims who decide to leave," he says.

The organisation Llwyddo'n Lleol is working alongside councils to address emigration from these areas, which it says is a major cause of language decline.