Add a column for Area median income to the spreadsheets

[KameronKerger]

Describe the bug
Area median income is used to calculate the low median income indicator. A request was sent to the support inbox to be able to have the value of area median income in order to unpack the calculation.

To Reproduce
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2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
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Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context
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