Bar chart
A bar chart displays the proportion of foreign-born residents in seven European countries, with Luxembourg leading at 45.9 percent and Germany at 14.5 percent. The visualization encodes values with circles plotted at bar positions, using D3's `scalePoint` and `scaleLinear` for axes. Axis ticks use `axisBottom` and `axisLeft`, with `format(".0%")` for percentage labels. The SVG output is generated by appending circles to a group, with data loaded from a CSV file.