condition mean min max ZT0-3 2145.55 2145.55 2145.55 ZT4-7 1943.7 1943.7 1943.7 ZT8-11 1699.0 1699.0 1699.0 ZT12-15 1509.05 1509.05 1509.05 ZT16-19 1960.9499999999998 1960.9499999999998 1960.9499999999998 ZT20-23 2214.4 2214.4 2214.4