condition mean min max ZT0-3 189.3 189.3 189.3 ZT4-7 221.8 221.8 221.8 ZT8-11 206.3 206.3 206.3 ZT12-15 224.2 224.2 224.2 ZT16-19 195.9 195.9 195.9 ZT20-23 181.75 181.75 181.75