condition mean min max ZT0-3 0.49563375 0.4538405 0.537427 ZT4-7 0.7261545 0.7261545 0.7261545 ZT8-11 0.855729 0.855729 0.855729 ZT12-15 0 0 0 ZT16-19 0.1512865 0.1512865 0.1512865 ZT20-23 0.11397115 0.11397115 0.11397115