condition mean min max ZT0-3 0.0320671 0.0320671 0.0320671 ZT4-7 0.0 0.0 0.0 ZT8-11 0.01522205 0.01522205 0.01522205 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0162494 0.0162494 0.0162494 ZT20-23 0.0 0.0 0.0