condition mean min max ZT0-3 2001.1 2001.1 2001.1 ZT4-7 3407.9 3407.9 3407.9 ZT8-11 2785.7 2785.7 2785.7 ZT12-15 2937.8500000000004 2937.8500000000004 2937.8500000000004 ZT16-19 2124.1 2124.1 2124.1 ZT20-23 2142.5 2142.5 2142.5