condition mean min max ZT0-3 0.0363385 0.0363385 0.0363385 ZT4-7 0.038406 0.038406 0.038406 ZT8-11 0.036779 0.036779 0.036779 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0115449 0.0115449 0.0115449