condition mean min max ZT0-3 0.03807272575 0.0325226585 0.043622793 ZT4-7 0.08795629433333334 0.0 0.17591258866666667 ZT8-11 0.04456907433333333 0.023062297 0.06607585166666667 ZT12-15 0.0 0.0 0.0 ZT16-19 0.011913511500000001 0.0 0.023827023000000003 ZT20-23 0.010402232999999999 0.0 0.020804465999999997