condition mean min max ZT0-3 79.8 79.8 79.8 ZT4-7 64.8 64.8 64.8 ZT8-11 69.0 69.0 69.0 ZT12-15 73.55 73.55 73.55 ZT16-19 76.05 76.05 76.05 ZT20-23 127.4 127.4 127.4