Estimates of the annual gross and net volume are continually updated on the basis of the Swedish Forest Agency’s (SFA) felling model. Gross felling is also estimated on the basis of the Swedish National Forest Inventory’s (NFI) survey of felling stumps.
The NFI also estimate the area of final felling, thinning and pre-commercial thinning.
The estimates of most variables are too uncertain at county level on year basis. Therefore they are presented as three-year moving average.