condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.040489000000000004 0.040489000000000004 0.040489000000000004 ZT12-15 0.024451166666666666 0.0 0.04890233333333333 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0