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 0.045513500000000005 0.0 0.09102700000000001 ZT16-19 0.065126 0.0 0.130252 ZT20-23 0 0 0