condition mean min max ZT0-3 0.2837335 0.0 0.4311855 ZT4-7 0.0 0.0 0.0 ZT8-11 0.528905 0.528905 0.528905 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0