condition mean min max ZT0-3 1859.75 1859.75 1859.75 ZT4-7 3279.1 3279.1 3279.1 ZT8-11 3018.45 3018.45 3018.45 ZT12-15 2958.95 2958.95 2958.95 ZT16-19 2706.8 2706.8 2706.8 ZT20-23 2212.15 2212.15 2212.15