More than 70% of such farms have been developed within 7.5km of protected nature sites.
Experts have said government agencies have failed to both prevent and adequately tackle the problem.
The trust declined to comment on the £8.45m cost of this recall process.
Neurology services are under strain following on from the scandal relating to the practices of Michael Watt.
Numbers of people in employment are to the nearest hundred thousand. Numbers for each year were taken in the first quarter of each year in question.