condition mean min max ZT0-3 1.05 1.05 1.05 ZT4-7 1.4 1.4 1.4 ZT8-11 0.8 0.8 0.8 ZT12-15 2.85 2.85 2.85 ZT16-19 2.2 2.2 2.2 ZT20-23 7.3500000000000005 7.3500000000000005 7.3500000000000005