This area chart visualizes US cancer cases from 2009 to 2022, using a filled path beneath a black line to emphasize the trend over time. The visualization loads CSV data from a GitHub gist and renders it as an SVG using D3 v5. It employs `d3.scaleLinear` for both axes, `d3.line` and `d3.area` generators with `curveBasis` for smooth interpolation, and `d3.axisBottom` and `d3.axisLeft` for labeled gridlines. The chart is styled with custom CSS classes for the axis labels and colored area fill.