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 0.01586773333333333 0.0 0.03173546666666666 ZT16-19 0.0 0.0 0.0 ZT20-23 0.056352000000000006 0.056352000000000006 0.056352000000000006