Year
Number
Minimum (m3)
Maximum (m3)
Mean (m3) Total (m3)
Average annual development rate (m3 y–1)
2009 1153 0.86 49.54 8.90 10257.60 743.20
2012 2045 0.57 54.80 8.50 17376.93
2018 2413 0.57 55.38 8.33 20110.76
2021 2312 0.01 53.16 8.29 19175.95