Fig. 2

Boxplot of the wood harvest data in Norway, Sweden and Finland for the different tree species and wood classes. The first upper-case letters stand for the tree species with S for spruce, P for pine and B for birch, while the second and third letter stand for wood classes with sl for sawlogs, pw for pulpwood and wb for wood for bioenergy. The central red line in each box indicates the median, and the bottom and top edges of the box are the 25th and 75th percentiles, respectively. The whisker indicates 1.5 times of the 75th percentile minus the 25th percentile to the bottom or top edge of the box if outliers are detected. Otherwise, it indicates the minimum (bottom whisker) or the maximum (top whisker). The outliers are the points that fall outside of the whisker and are indicated with the red ‘ + ’ symbol