This visualization displays the average US net worth over time using a combined line and area chart, with the area filled in orange and the line drawn in black. It loads CSV data from a GitHub gist and parses the year values as dates. The chart uses D3 v5 APIs including `scaleTime`, `scaleLinear`, `axisBottom`, `axisLeft`, `line`, and `area`, with `curveBasis` applied to smooth both the line and area paths. The SVG rendering includes gridlines, labeled axes, and a bold blue title.