condition mean min max ZT0-3 2659.5 2659.5 2659.5 ZT4-7 1661.9 1661.9 1661.9 ZT8-11 1552.7 1552.7 1552.7 ZT12-15 1830.6 1830.6 1830.6 ZT16-19 1712.95 1712.95 1712.95 ZT20-23 1768.95 1768.95 1768.95