condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0310587 0.0310587 0.0310587 ZT16-19 0.0315529 0.0315529 0.0315529 ZT20-23 0.0 0.0 0.0