And so the other hint they give us or piece of data they give us is that the percent drops by 0.5% each year. So here, what's happening? As 10 years go by, let's see. As we go from, let's start with, let's see, in 1967, where it looks like we're at about 55%. And then 10 years go by, we are roughly at around 45%, a little under 45%. So we dropped 10% in 10 years. That seems to be how much this is dropping, about roughly 10% in 10 years.