This line chart displays the population of the USA from 1960 to 2021. The visualization uses D3 v5 to load CSV data and render an SVG path. It employs `scaleTime` and `scaleLinear` for the axes, with `axisBottom` and `axisLeft` to generate ticks and gridlines. The line is drawn using the `line` generator, and the dataset is parsed with `d3.timeParse`.