condition mean min max ZT0-3 714.0 714.0 714.0 ZT4-7 143.1 143.1 143.1 ZT8-11 195.65 195.65 195.65 ZT12-15 262.95 262.95 262.95 ZT16-19 589.5 589.5 589.5 ZT20-23 694.15 694.15 694.15