Accumulation of favourable or unfavourable results is based on 11 indicators. If the scores on at least 9 of these 11 indicators are significantly better than average, this is designated as an accumulation of favourable scores. If at least 4 of the indicators have scores significantly below average, this indicates an accumulation of unfavourable results. The reason for the different thresholds is that on average there are more favourable than unfavourable scores. The selected thresholds ensure that the groups at the top and the bottom of the distribution are about the same size.