condition mean min max ZT0-3 0.0199577 0.0199577 0.0199577 ZT4-7 0.0232052 0.0232052 0.0232052 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.02051875 0.02051875 0.02051875 ZT20-23 0.010136 0.010136 0.010136