condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0111685105 0.0 0.022337021 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0353864735 0.0 0.070772947 ZT20-23 0.041739696 0.017668348 0.065811044