condition mean min max ZT0-3 0.0279575 0.0 0.055915 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.028787999999999998 0.0 0.057575999999999995 ZT16-19 0.0 0.0 0.0 ZT20-23 0 0 0