condition mean min max ZT0-3 1016.25 1016.25 1016.25 ZT4-7 1181.1 1181.1 1181.1 ZT8-11 1115.1 1115.1 1115.1 ZT12-15 1018.6 1018.6 1018.6 ZT16-19 1027.3 1027.3 1027.3 ZT20-23 1157.4 1157.4 1157.4