condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 1.7965200000000001 1.7965200000000001 1.7965200000000001 ZT8-11 1.019695 1.019695 1.019695 ZT12-15 0.7724705000000001 0.7724705000000001 0.7724705000000001 ZT16-19 0.119439 0.119439 0.119439 ZT20-23 0.059854 0.059854 0.059854