It is indeed a risk, and we saw that in the government's budget.
The government's budget assumes slightly higher interest rates than we have assumed, and that has led the interest cost of the government to increase by about $17 billion over a five-year horizon, compared with our own outlook for the same period. Just because the government forecasts slightly higher interest rates than we at the PBO have done, that leads to $17.7 billion, I think, over five years, in additional debt servicing costs. That's the same medium-term perspective.
For example, due to an international financial crisis, for example, or just rising interest rates because the economy is picking up speed, that could lead to additional spending on debt servicing costs alone.