condition mean min max ZT0-3 971.8 971.8 971.8 ZT4-7 1153.7 1153.7 1153.7 ZT8-11 1055.1 1055.1 1055.1 ZT12-15 917.0 917.0 917.0 ZT16-19 1077.65 1077.65 1077.65 ZT20-23 996.35 996.35 996.35