I thought this was a really cool idea, so I've turned all y'alls data into a spreadsheet!
The sheet automatically calculates the averages and totals when new data is added to it, it will also do the percentages of the rarity groups for each pound automatically. I also put some charts in so it's easier to see trends over time.
Here is the link, feel free to play around with it.
https://docs.google.com/spreadsheets/d/1CHxVBuG269MUbEauSiv8BdsM8uXeh5_-rxMZ5P93FI8/edit?usp=sharing
If you add more data, please try to keep the same formatting so nothing breaks, and also add your username to the credits!