Need help with attraction price level

Hi all! I'm using the sports hall and indoor pool to satisfy my citizens' sports needs considering that the outdoor buildings don't work in winter. However, since they're technically attractions they include price levels.

I've heard that price levels are essentially used to determine the balance of tourist vs citizen, but I don't actually know the exact numbers. Considering that I'm only using these buildings for citizens, I want the price level to swing the balance 100% in the citizen direction, but what setting does it need to be on for this to be the case? Essentially, what does each number in the price level mean?