This example shows the projected population of 15 countries in 2060 as a horizontal bar chart, using data from the UN Population Projections CSV file. It loads the data with the `csv` function, then scales the bar lengths with `scaleLinear` and positions country labels with `scaleBand`. The chart renders as SVG elements—`rect` bars, `line` gridlines, and `text` labels—all coordinated through React state management with `useState` and `useEffect` for fetching, and the D3.js v5 library for layout and scaling.