Stalk Market Analysis: Turnip Workbook

I've become very interested in the Stalk Market lately and the Sow Joan's average. I've started recording my white turnip prices on Google Docs and will publish the raw data here as it comes in. Of course, your prices will differ from mine but the goal here is to find a pattern that may be present in the stalk market that spans all Animal Crossing: Wild World games. Hopefully that pattern will make itself apparent after enough data has been collected.

Here is the spreadsheet on Google Docs. In the future I hope to add a dynamic web graph to Leave Luck to Us.