This example plots U.S. nuclear capacity in megawatts over time as a single slateblue line. The visualization uses an SVG rendered through D3 v4, with a time-scaled x-axis and linear y-axis. Data is loaded from an external CSV file and parsed with `d3.timeParse`. The chart includes labeled axes and is built with `d3.scaleTime`, `d3.scaleLinear`, `d3.axisBottom`, `d3.axisLeft`, and `d3.line`.