Does air contents of oxygen change with changing barometric pressure?

There is a correlation between altitude and percent oxygen that shown in this table (click it for full view)

On sea level as benchmark, do air contents of oxygen get higher under higher / rising barometric pressure? as comparing under lower / falling barometric pressure?

Do you have any suggestions?
Thank you very much for any suggestions (^v^)

I think bio_man is wrong because as altitude increases, total air pressure decreases. For example, there are fewer molecules present in the given volume of air. This means that the percentage oxygen in those molecules at higher altitude is exactly the same as 21% as that of the sea level, except that there are fewer molecules of everything including oxygen.

I may be wrong, but this is how I've always looked at it.


If what I've said to be true, you're going to have 21% at sea level regardless of what the pressure is that day (high/low, etc.)....



good luck

Rookie mistake, you're right.   

Thanks, to everyone very much for suggestions (^v^)