condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.023884100000000002 0.023884100000000002 0.023884100000000002 ZT12-15 0.0092609 0.0 0.0185218 ZT16-19 0.0 0.0 0.0 ZT20-23 0 0 0