condition mean min max ZT0-3 0.007493175 0.0 0.01498635 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0152552 0.0152552 0.0152552 ZT12-15 0 0 0 ZT16-19 0.0147185 0.0147185 0.0147185 ZT20-23 0.0 0.0 0.0