This visualization shows population growth in the United States, Canada, and Mexico from 1890 to 2010, with each country represented by a colored line and gray circles for individual data points. Hovering over a circle displays a tooltip with the country, year, and population growth value. The chart uses d3.line and d3.scaleLinear to generate SVG paths, with data loaded from a simplified CSV derived from the Corgis global development dataset. Interactive mouseover, mousemove, and mouseout events control the tooltip's visibility and content.