This bar chart displays the population of the top 10 most populous countries, using 2018 estimates from the United Nations World Population Prospects. The visualization demonstrates custom axis formatting: the x-axis converts large numbers to abbreviated form—replacing 'G' with 'B'—and removes default axis lines for a cleaner look. Built with D3 v5, it uses `scaleLinear` and `scaleBand` for scaling, and `axisBottom` and `axisLeft` for axes. Data is loaded from a CSV file via `d3.csv` and rendered as SVG rectangles.