This pie chart displays 2022 US auto sales by brand, showing each manufacturer’s market share as a percentage and total units sold in thousands. The visualization uses D3 v5’s `pie` and `arc` generators to compute and draw SVG path segments, with `scaleOrdinal` assigning categorical colors. A legend on the right lists each brand with its percentage and sales volume, formatted via `d3.format`. Data is loaded asynchronously from a CSV gist using `d3.csv`, and the chart is rendered with SVG elements in a blank 960×450 canvas.