condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.020361054833333333 0.0 0.040722109666666666 ZT12-15 0.010979396333333334 0.0 0.021958792666666668 ZT16-19 0.010074712000000001 0.0 0.020149424000000003 ZT20-23 0.010402232999999999 0.0 0.020804465999999997