condition mean min max ZT0-3 0.03711966666666667 0.0 0.056361 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.061452 0.0 0.122904 ZT16-19 0.0547625 0.0547625 0.0547625 ZT20-23 0.0617505 0.0617505 0.0617505