It would be a comprehensive energy balance, by province, to start with. We don't have any alternatives. We try to fill the Xs by looking at the past. The Xs are not always in the same place year after year. Our friends and colleagues from whatIf? Technologies, have a simulation model covering a longer historical part than us. By building year by year from history, you can try to fill in the X, by looking at different years when more data was available. There are a lot of tricks and cross-checks to be able to....