This line chart displays yearly run totals from a CSV file, using a blue line to show the trend over time. The D3 v5 code leverages `scaleTime` and `scaleLinear` to map data to axes, `axisBottom` and `axisLeft` for tick marks, and a `line` generator to create the path. The SVG is rendered with a grid and labeled axes, with data loaded via D3's `csv` function.