condition mean min max ZT0-3 0.0160503 0.0160503 0.0160503 ZT4-7 0.01185745 0.01185745 0.01185745 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.038270083333333337 0.038270083333333337 0.038270083333333337 ZT20-23 0.0 0.0 0.0