condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.006950413999999999 0.0 0.013900827999999999 ZT8-11 0.0 0.0 0.0 ZT12-15 0.007916592833333335 0.0 0.01583318566666667 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0