Making a Bar Chart
This bar chart displays the population of the top 10 most populous countries, using 2018 estimates from the United Nations World Population Prospects. The chart employs D3’s `scaleLinear` for the x-axis and `scaleBand` for the categorical y-axis, with custom axis tick formatting that converts values to billions. Axes are styled by removing domain lines and tick marks, while a title and axis label are added as SVG text. Data is loaded from a CSV file and rendered as steelblue rectangles.