And let's say we do it over every 20 years because that'll be useful because we're going 20 years back. So if we go 20 years from this point, so this is 1965, you go 20 years in the future. So that is 10 years and then that is 20 years. So my change in the horizontal is 20 years. What's the change in the vertical? Well it looks like we have a decrease of a little bit more than 10%. Looks like it's 11 or 12% decrease.