If you look at commodity markets over hundreds and hundreds of years, it's normally demand that's peaked before supply has. I mean Zaki Yamani, who is the former Saudi Oil Minister, when the oil price collapsed in 86', said that 'The Stone Age didn't end because there were no more stones'. I could say that the Coal Age didn't end because there were no more coals, Iron Age didn't end because there were no more iron. Iron is still there, technology took over. And the Oil Age, I think, one day will end effectively. Not because of no more oil, it's because the price of oil will go up high enough to attract alternative energy sources, and to attract innovation. That's what will do it. So, I have a feeling, that demand will peak before supply does in the oil market.