This area chart displays the population of the USA from 1960 to 2021, with time on the x-axis and population count on the y-axis. The visualization uses D3 v5 with SVG rendering, employing `d3.scaleTime`, `d3.scaleLinear`, `d3.axisBottom`, and `d3.axisLeft`. It generates a line path via `d3.line` and fills the area beneath it using `d3.area` with `d3.curveBasis` smoothing. The data comes from a CSV file loaded with `d3.csv`, and axis labels are added directly in the SVG.