condition mean min max ZT0-3 0.022965666666666665 0.0 0.068897 ZT4-7 0.0 0.0 0.0 ZT8-11 0.4263745 0.4263745 0.4263745 ZT12-15 0.073921 0.0 0.147842 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0