Whisky knowledge suggestion

I have quite enjoyed the whisky knowledge episodes presented by @ben. One suggestion for a whisky knowledge episode would be to see how the ABV in cask strength whiskies changes over the years. Because there is a lot single barrel/cask bottling being released from a lot of producers such as GlenDronach, BenRiach and Edradour. From all these bottling one can get a god view how the ABV changes in the casks/barrels over the years in different distilleries. Through such a graph one could see how much the Angels share is and it would also be interesting to see if the Angels share is different depending what storage houses a distillery has.