condition mean min max ZT0-3 204.4 204.4 204.4 ZT4-7 207.6 207.6 207.6 ZT8-11 197.0 197.0 197.0 ZT12-15 181.5 181.5 181.5 ZT16-19 153.4 153.4 153.4 ZT20-23 235.2 235.2 235.2