condition mean min max ZT0-3 1136.6 1136.6 1136.6 ZT4-7 623.6 623.6 623.6 ZT8-11 423.1 423.1 423.1 ZT12-15 384.5 384.5 384.5 ZT16-19 348.1 348.1 348.1 ZT20-23 660.45 660.45 660.45