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 customizes both D3 axes: the left axis has all domain lines and tick lines removed, while the bottom axis uses a tick format that converts values from billions to a compact "B" suffix and extends tick lines across the plot. The chart applies a steelblue fill to all bars and uses custom font styles for ticks, labels, and the title. Data is loaded from a CSV file and scaled using `scaleLinear` and `scaleBand`.