Understand the selling houses is different than selling cars or refrigerators;
each house is qunique and can be sold only once.
If a particular house appreciates 5% in the last year, (based on Comps), then it will contribute to the Comps the next time someone searches. But that house is gone.
So the housing market is dynamic, uniquely dynamic.
This would equate to the boy who drowns in a lake that averaged 6" deep.
The best you can hope for, and the statistic that you are looking for, is a particular house in a particular neighborhood.
Think; location, location.....