condition mean min max ZT0-3 0.026102833333333336 0.026102833333333336 0.026102833333333336 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.023536500000000002 0.023536500000000002 0.023536500000000002 ZT20-23 0.0 0.0 0.0