condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.03597731366666667 0.029984054333333333 0.041970573000000004 ZT12-15 0.0148933525 0.0 0.029786705 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0