condition mean min max ZT0-3 0.009473892999999999 0.0 0.018947785999999998 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.035938459 0.0 0.071876918 ZT20-23 0.0 0.0 0.0