condition mean min max ZT0-3 0.0118305 0.0118305 0.0118305 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0072613 0.0072613 0.0072613 ZT12-15 0.0 0.0 0.0 ZT16-19 0.01632195 0.01632195 0.01632195 ZT20-23 0.0 0.0 0.0