condition mean min max ZT0-3 0.40597 0.0 1.21791 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 1.07999 0.0 2.15998 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0