condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.05572609383333333 0.021958792666666668 0.08949339499999999 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0