That's right.
The study that we do—and we call it fiscal sustainability, which is a long-term study—is the sort of standard kind of exercise that most OECD countries actually do. This is to help governments and policy-makers have a framework for the future, taking into account the impact of long-term trends, like the demographic changes. We don't really call the study a forecast; it's a scenario now, a “what if” scenario. We assume that the current fiscal structure that exists right now would not change, which means no new tax measures, no new expenditure measurements. There are some of the standard assumptions that you make in terms of how the expenditures will develop over time, or taxes; the tax burden would remain constant. Under those conditions, and assuming that the interest rates, as you mentioned, will go to their normal level, over that 75-year period—you may have ups and downs during that period, but on average, if they stay at the normal level—then you can measure the impact on the government balances every year, and then that will help you to measure the impact on overall public debt. That's the framework.