condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.01091673 0.0 0.02183346 ZT8-11 0.0115311485 0.0 0.023062297 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0