condition mean min max ZT0-3 606.9 606.9 606.9 ZT4-7 1054.5 1054.5 1054.5 ZT8-11 1019.3 1019.3 1019.3 ZT12-15 660.15 660.15 660.15 ZT16-19 399.79999999999995 399.79999999999995 399.79999999999995 ZT20-23 571.2 571.2 571.2