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. Another 10 years go by. We go from 45% or a little more than 10% in 10 years. And so that would mean that we're dropping, on average, more than 1 percentage point per year.