condition mean min max ZT0-3 0.009986325 0.0 0.01997265 ZT4-7 0.0416636 0.0416636 0.0416636 ZT8-11 0.02022705 0.02022705 0.02022705 ZT12-15 0 0 0 ZT16-19 0.0201588 0.0201588 0.0201588 ZT20-23 0.0 0.0 0.0