condition mean min max ZT0-3 1.3 1.3 1.3 ZT4-7 2.0 2.0 2.0 ZT8-11 26.05 26.05 26.05 ZT12-15 14.15 14.15 14.15 ZT16-19 12.15 12.15 12.15 ZT20-23 6.65 6.65 6.65