This visualization shows U.S. tax revenue as a percentage of GDP over time, plotting each year as a green circle. The chart uses D3 v5’s `csv` loader to fetch data from a VizHub-hosted CSV file, then renders the scatterplot in SVG. Axes are generated with `axisBottom` and `axisLeft`, while `scaleLinear` maps year and revenue values to screen coordinates. The visualization includes labeled axes, a title, and formatted tick values.