condition mean min max ZT0-3 0.01574755 0.0 0.0314951 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0098849 0.0098849 0.0098849 ZT12-15 0.0 0.0 0.0 ZT16-19 0.034006 0.034006 0.034006 ZT20-23 0.0 0.0 0.0