condition mean min max ZT0-3 0.030883775000000002 0.0 0.061767550000000004 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0627595 0.0627595 0.0627595 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.061845449999999996 0.061845449999999996 0.061845449999999996