condition mean min max ZT0-3 0.018404166666666666 0.0 0.03680833333333333 ZT4-7 0.0 0.0 0.0 ZT8-11 0.025450200000000003 0.025450200000000003 0.025450200000000003 ZT12-15 0.0168535 0.0 0.033707 ZT16-19 0.0296397 0.0296397 0.0296397 ZT20-23 0.0 0.0 0.0