condition mean min max ZT0-3 0.0194411 0.0 0.0432998 ZT4-7 0.013796 0.013796 0.013796 ZT8-11 0.0 0.0 0.0 ZT12-15 0.007244825 0.0 0.01448965 ZT16-19 0.01403885 0.01403885 0.01403885 ZT20-23 0.0 0.0 0.0