There are ten level-four incidents in the history of the industry. There are five level-five incidents now; Fukushima is now seen as a level five.
What I've calculated is the number of operating hours in each year. I can go back, and we know the number of reactors that were operating. If you look at the period between Chernobyl and Fukushima, you have almost 5,000 operating hours. The point of that graph is not to predict that incidents will happen, but to show that they do happen. When we get a review, as we have heard today from the utility, it is a reaction to a reality.
There have been ten incidents over 60 years. But the industry was building up the number of reactors. One of the interesting things about the period between Chernobyl and Fukushima is that we did not have a lot of new plants coming online. There were very few plants coming online. So the number of incidents is small, but as the number of reactors increases, you need to pay attention to the rate of accidents per operating year.