condition mean min max ZT0-3 0.09981833333333334 0.0214535 0.233077 ZT4-7 0.04205875 0.04205875 0.04205875 ZT8-11 0.15475450000000002 0.15475450000000002 0.15475450000000002 ZT12-15 0.08129800000000001 0.0 0.16259600000000002 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0