This visualization shows the number of houses sold in the United States per year for ten years, displayed as a pie chart with a legend listing each year and its corresponding sales figure. The chart renders using SVG via D3 v5, with the pie layout from `d3.pie` and arcs from `d3.arc`. Colors are assigned using `d3.scaleOrdinal` with `schemeCategory10`. Data is loaded from a CSV file using `d3.csv`, and values are formatted with a custom number formatter that appends "K" for thousands.