condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.180286 0.180286 0.180286 ZT12-15 0.051726875 0.03898575 0.064468 ZT16-19 0.0 0.0 0.0 ZT20-23 0 0 0