condition mean min max ZT0-3 0.0349467 0.0349467 0.0349467 ZT4-7 0.02205995 0.02205995 0.02205995 ZT8-11 0.03602495 0.03602495 0.03602495 ZT12-15 0.0 0.0 0.0 ZT16-19 0.03901215 0.03901215 0.03901215 ZT20-23 0.03820355 0.03820355 0.03820355