condition mean min max ZT0-3 0.23299 0.0 0.46598 ZT4-7 0.70431 0.70431 0.70431 ZT8-11 0.54984 0.54984 0.54984 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0