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Good reasons to write:

• A figure looks wrong. Please include the page URL, the figure, and, if you have one, the source you're comparing it with. I check reports against the original data and correct confirmed errors.
• Feedback or a bug. Something confusing, broken on your device, or missing.
• Questions about the data. Where a number comes from or how it's calculated. The About page lists the sources and formulas.

I usually reply within a few days. I can't give personal financial advice: I'm not a financial professional, and the site can't tell you what to do with your money. For that, please talk to a qualified advisor.