condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.05791439566666667 0.022337021 0.09349177033333333 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0