condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0531015 0.0531015 0.0531015 ZT8-11 0.0 0.0 0.0 ZT12-15 0.02882315 0.02882315 0.02882315 ZT16-19 0.038355 0.038355 0.038355 ZT20-23 0.0 0.0 0.0