[US_PA] Discrepancies between dynamic text and visualization in PA dashboard

[hobuobi]

Describe the bug
The dynamic text doesn't match the visualization (43% vs 46% Black folks in SCIs, 40% vs 43% White folks in the SCIs, etc.). See below.

To Reproduce
Steps to reproduce the behavior:

1. Go to the Racial Disparities page of the Pennsylvania dashboard.
2. Scroll or click to the 2nd section (titled "Disparities are already present before incarceration").
3. Hover over the dark blue bar (for the proportion of the selected race that is present in the State Correctional Institutions).
4. Observe the discrepancy between that and the relevant dynamic text in the copy.

Expected behavior
The dynamic text and the visualization should match in what they tell the user.

Desktop (please complete the following information):
Screenshots taken on a Mac (Big Sur) in Google Chrome (93.0.4577.82)

[macfarlandian]

the cause of this is that people with race/ethnicity unknown are being dropped from the chart data but counted toward the total that we use to calculate the number in the text; in other words the percentages in the text are smaller because they are calculated with a larger denominator.

I don't know whether the usual footnote treatment of unknowns would be sufficient here? The percentages would still be different but it would at least provide more context. If we wanted to do something more drastic than that we'd have to scope it out some more.