This example visualizes mobile cellular subscriptions per 100 people from 1990 to 2010 for five North American countries, using a multiline chart to compare trends over time. It relies on D3 v7 with SVG rendering, a linear scale for time, and a color scale from ColorBrewer to distinguish countries. The chart includes a tooltip on mouseover and a legend from the d3-legend library, with data sourced from the Global Development dataset.