condition mean min max ZT0-3 0.025023175 0.01642325 0.0336231 ZT4-7 0.051389 0.051389 0.051389 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.0330874 0.0330874 0.0330874 ZT20-23 0.0 0.0 0.0