This area chart visualizes the Goods and Service Tax of a country across different years, using a curved line and a filled area beneath it to emphasize the trend. The chart employs D3 v5's `scaleTime`, `scaleLinear`, `line`, and `area` generators with `curveBasis` for smoothing, rendering as SVG. The y-axis labels are formatted with `format('.3s')`, and the data is loaded via `csv` from a hosted dataset. Grid lines are styled green, with a bold black line and pink fill for the area.