condition mean min max ZT0-3 1047.9 1047.9 1047.9 ZT4-7 990.5 990.5 990.5 ZT8-11 994.0 994.0 994.0 ZT12-15 819.55 819.55 819.55 ZT16-19 982.75 982.75 982.75 ZT20-23 1164.7 1164.7 1164.7