SocketRocket
Ryder Cup Winner
Based on the definition of emigration, it doesn't include students leaving. It only covers those leaving their native country.
It definitely does make sense.
Immigration - people leaving their native countries to come to ours
Emigration - people leaving our native country to go to another.
I am very confident that the emigration figure of 270,000 is the number of British people that have left the UK to live overseas.
It's not from their 'Native Country' but from where they have been 'Normally Residing'.