sounds to me its a bit like the immigration numbers when the gov try and tell us that there are only a few thousand visas handed out every year all the rest are sent back apparently once they have found out where they came from because they all report to the police station or wherever they are told to at regular intervels .
Thing is they have to show a token amount of ee drivers because they are right across the service industry and even the nimbys cant miss them in thier posh coffee shops and nail bars.