condition mean min max ZT0-3 4912.0 4912.0 4912.0 ZT4-7 13709.7 13709.7 13709.7 ZT8-11 10692.0 10692.0 10692.0 ZT12-15 7596.5 7596.5 7596.5 ZT16-19 2959.9 2959.9 2959.9 ZT20-23 1940.3 1940.3 1940.3