This area chart displays car sales by year up to 2020, using a smooth basis curve to connect data points while filling the area beneath the line in green. The visualization employs d3's `scaleTime` and `scaleLinear` for axes, along with the `line`, `area`, and `curveBasis` generators to create the chart. Data is loaded from a CSV file hosted on GitHub, parsed with d3's time parsing, and rendered as SVG with custom axis labels and tick formatting.