condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0058448250000000005 0.0058448250000000005 0.0058448250000000005 ZT12-15 0.0 0.0 0.0 ZT16-19 0.007169516666666666 0.007169516666666666 0.007169516666666666 ZT20-23 0.0 0.0 0.0