The vast majority (73 per cent) of the low forest stands is below 20 years in age. On the other hand, the old-growth forest stands (aged above 140 years), either already protected or in need of protection, still account for 4 per cent of the high forests. As the forests surrounding villages are used for grazing, no clear distinction can be made between these two different land-use forms. Official statistics often aggregate data on forest surface with the surface of pastures.