In-depth studies were conducted from 1992–93, culminating the updating of the 1991 law followed by further evacuations from the Polesia area. A number of evacuation zones were determined: the "Exclusion Zone", the "Zone of Absolute (Mandatory) Resettlement" and the "Zone of Guaranteed Voluntary Resettlement", as well as many areas throughout Ukraine designated as areas for radiation monitoring. The evacuation of contaminated areas outside of the Exclusion Zone continued in both the compulsory and voluntary resettlement areas, with 53,000 people evacuated from areas in Ukraine from 1990 to 1995.