This line chart visualizes the global unemployment rate trend from 1991 to 2023, using yearly averages calculated from raw data loaded via `d3.csv` from a Gist URL. The chart displays a smooth monotone curve (`d3.curveMonotoneX`) in steelblue, with an x-axis for years and a y-axis labeled with percentages. The implementation uses `d3.scaleLinear` for both axes, `d3.axisBottom` and `d3.axisLeft` for tick marks, and `d3.group` with `d3.mean` to aggregate monthly rates by year. The SVG rendering is responsive, with the chart width adapting to the viewport.