condition mean min max ZT0-3 0.13952415 0.1069173 0.172131 ZT4-7 0.0548425 0.0548425 0.0548425 ZT8-11 0.0532505 0.0532505 0.0532505 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0267282 0.0267282 0.0267282