condition mean min max ZT0-3 0.0032478 0.0 0.0097434 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.010576475 0.010031 0.01112195 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0