I think probably the most straightforward or simplest way to express the flexibility would be to think of an average effective interest rate on debt charges, with one proviso of about 5%. So, more or less, with debt reduction in the order of $100 billion, if the debt had been higher by $100 billion currently, the government would be paying about $5 billion more in debt charges.
As the Auditor General alluded to in the answer to an earlier question, some of that debt reduction has taken the form of an increase in assets. Most of those assets, however, do earn interest, so the net effect is the same, simply speaking. So, more or less, $5 billion would be a general rule of thumb if one wanted to get a sense of the flexibility.