You have probably seen other versions of this concept. Just decided to do my own. Nothing stops this train.

One of the missing components in teaching today is fluency. Assessing any skill with just percent correct is a mistake. This video explains why. It gets a little technical at times, and the first part is mostly history. However, I think it's worth the watch:

Added Case Shiller Home Price Nominal Index (CSHPNI) and M2 growth to my chart. Data points are medians.