I actually think that this might be one of those cases where the borders of a graph matter a lot. The way that they styled it here makes it look like a time ser

I actually think that this might be one of those cases where the borders of a graph matter a lot. The way that they styled it here makes it look like a time series, and makes it really difficult to interpret at first sight. I think flipping the axes to make it much akin to a cumulative distribution function would make it easier to read.