condition mean min max ZT0-3 0.0139465955 0.0 0.027893191 ZT4-7 0.0 0.0 0.0 ZT8-11 0.010613084 0.0039293585 0.0172968095 ZT12-15 0.00613364775 0.004014537 0.0082527585 ZT16-19 0.0 0.0 0.0 ZT20-23 0.00300744175 0.0 0.0060148835