This area chart displays revenue trends for five U.S. states—California, New York, Texas, Florida, and Illinois—from 2020 to 2023, with each state represented by a colored, semi-transparent filled area. The visualization uses D3.js v7 to parse a text file of comma-separated values, filter for the selected states, and render the chart as SVG. It employs linear scales for the x- and y-axes, an area generator with a linear curve, and ordinal color scaling via `d3.scaleOrdinal` with `d3.schemeCategory10`. The code explicitly draws axes, a legend, and a title, with data loaded asynchronously using `d3.text`.