condition mean min max ZT0-3 2120.05 2120.05 2120.05 ZT4-7 1997.0 1997.0 1997.0 ZT8-11 2104.65 2104.65 2104.65 ZT12-15 2087.6 2087.6 2087.6 ZT16-19 2364.9 2364.9 2364.9 ZT20-23 2277.25 2277.25 2277.25