condition mean min max ZT0-3 222.6 222.6 222.6 ZT4-7 155.8 155.8 155.8 ZT8-11 142.0 142.0 142.0 ZT12-15 223.4 223.4 223.4 ZT16-19 198.3 198.3 198.3 ZT20-23 243.2 243.2 243.2