This choropleth map shows the number of internet users by country in millions for 2022, using a blue color scale to represent the range from small (e.g., Switzerland, Australia) to large values (e.g., China, India). It renders a Natural Earth projection of the world with a graticule layer and a hover tooltip, built with D3 v7’s `d3.geoNaturalEarth1`, `d3.geoPath`, and `d3.geoGraticule`. The code assigns country-specific values via an ISO3 lookup table mapped from TopoJSON’s numeric IDs.