Many of the numbers have denominators in the underlying data: https://observablehq.com/@thadk/facebook-covid-survey-data-from-map https://observablehq.com/@tha

Many of the numbers have denominators in the underlying data: https://observablehq.com/@thadk/facebook-covid-survey-data-from-map https://observablehq.com/@thadk/facebook-covid-survey-data-f...