This area chart shows the trend of total global video game sales per year from 1980 onward, with a filled steelblue shape that highlights the growth over time. Built with D3, the code uses `rollup` and `sum` to aggregate the sample CSV data by year, then `scaleLinear` for both axes. The `area` generator creates the SVG path, while `axisBottom` and `axisLeft` render the axes. Data is sourced from a gist URL.