condition mean min max ZT0-3 0.024052333333333332 0.0 0.072157 ZT4-7 0.0353024 0.0353024 0.0353024 ZT8-11 0.03705215 0.03705215 0.03705215 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0