condition mean min max ZT0-3 0.1858182 0.1838434 0.187793 ZT4-7 0.1187382 0.1187382 0.1187382 ZT8-11 0.5882615 0.5882615 0.5882615 ZT12-15 0 0 0 ZT16-19 0.41552449999999996 0.41552449999999996 0.41552449999999996 ZT20-23 0.4182015 0.4182015 0.4182015