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 0.01534175 0.0 0.0306835 ZT16-19 0.0109589 0.0 0.0219178 ZT20-23 0 0 0