condition mean min max ZT0-3 0.0025449 0.0 0.0076347 ZT4-7 0.432585 0.432585 0.432585 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0