This bar chart displays the population of ten countries in the year 2000, ranked along a vertical axis. The visualization uses React with D3 v5's `scaleBand` and `scaleLinear` to map country names and population values to SVG rectangles. Data is loaded via `d3.csv` from a GitHub-hosted CSV file, with population values converted from thousands. Axis components use `tickFormat` to abbreviate large numbers, converting 'G' to 'B' for billions.