condition mean min max ZT0-3 0.13195525 0.1304135 0.133497 ZT4-7 0.3378575 0.3378575 0.3378575 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0