Yes, I'd like to think that. It's also a bit like forecasting the weather. Sometimes the best thing we can use is the Farmers’ Almanac.
We can develop the models, but again, it's a model and not the actual. Our best evidence, invariably, has been whatever the previous year was, or the years before. But in terms of models, they come out our ears. We have lots of models, and I would say they're getting more and more refined.