condition mean min max ZT0-3 0.0079344 0.0 0.0158688 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0133002 0.0133002 0.0133002 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0