condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.03732033333333333 0.03616766666666667 0.038473 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0