One thing we do with our scenarios is that we do make a balance. We do make demand and supply meet. That's one of the outcomes that happens in all of our scenarios.
You asked me a couple of questions there. One was with respect to whether the increase is reasonable. I'm not familiar with the data you referred to, and I couldn't say exactly what the numbers are that we're using. But one thing we do note is that there seems to be a very strong link between energy usage and GDP growth. As we all get a little more wealthy as a country and as an economy, we tend to use energy a little bit more. So we tend to see there is an overall linkage towards those.
At the same time, we're seeing a significant improvement in efficiencies. Energy use is still growing. It's not growing as fast as GDP, but it is growing, and it's growing faster than population. If you look at it, it's sort of between the two.
With regard to the percentage, if we're talking about the energy needs increasing over time, I think that's true; they will increase over time, and that's what we indicated. We just looked at the electricity demand aspect in our slide. You can see there's quite a significant growth. From now until 2030, I think in one case there was a 25% increase up to about a 50% increase in energy demand over that period of time. And that's only electricity; there are other forms of energy as well, of course.
The other thing to note is that where you source that energy changes. It doesn't change significantly, but there are shifts. For example, in one of the scenarios, we had a significant growth in wind contributing to the larger consumption needs in that period of time up to 2030.
So to answer your questions, it's a bit of both; it's both.