condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.010789600000000002 0.0 0.021579200000000003 ZT16-19 0.015109383333333332 0.0 0.030218766666666664 ZT20-23 0 0 0