condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.04340150066666667 0.0 0.08680300133333334 ZT12-15 0.11970239116666666 0.0 0.23940478233333332 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0