This line chart displays the average age of diabetic individuals over a range of years. It uses the D3 v5 library, with `d3.scaleLinear` for both axes, `d3.axisBottom` and `d3.axisLeft` for tick marks, and `d3.line` with a basis curve to create a smooth path. The SVG rendering includes gridlines, axis labels, and a title, with data loaded from a CSV file via `d3.csv`. The line is styled green with three-pixel width in CSS.