condition mean min max ZT0-3 0.010047075 0.0 0.02009415 ZT4-7 0.0202801 0.0202801 0.0202801 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.0404032 0.0404032 0.0404032 ZT20-23 0.0612865 0.0612865 0.0612865