This multi-line chart by Finn-Luka visualizes the rise and fall of CD unit sales from 1983 to 2019, alongside the emergence of on-demand streaming from 2010 onward. It shows the explosive growth of CDs peaking around 1,588 million units in 2000, followed by a steady decline as digital music took over. The visualization uses `d3.scaleLinear`, `d3.scaleOrdinal`, and `d3.line` to render the trends, with `@curran/responsive-axes` handling the axis layout. The data is parsed from an embedded CSV, combining "CD Single" into "CD" and renaming streaming formats for clarity.