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 0.02079425 0.0 0.0415885 ZT16-19 0.04029455 0.04029455 0.04029455 ZT20-23 0.087634 0.087634 0.087634