condition mean min max ZT0-3 99.95 99.95 99.95 ZT4-7 165.4 165.4 165.4 ZT8-11 136.9 136.9 136.9 ZT12-15 106.0 106.0 106.0 ZT16-19 72.80000000000001 72.80000000000001 72.80000000000001 ZT20-23 37.85 37.85 37.85