condition mean min max ZT0-3 19180.75 19180.75 19180.75 ZT4-7 18088.0 18088.0 18088.0 ZT8-11 18546.6 18546.6 18546.6 ZT12-15 16836.4 16836.4 16836.4 ZT16-19 19949.7 19949.7 19949.7 ZT20-23 19492.75 19492.75 19492.75