condition mean min max ZT0-3 0.28498675 0.2838585 0.286115 ZT4-7 0.0728015 0.0728015 0.0728015 ZT8-11 0.0363654 0.0363654 0.0363654 ZT12-15 0 0 0 ZT16-19 0.07031075 0.07031075 0.07031075 ZT20-23 0.0 0.0 0.0