This interactive D3.js visualization displays GDP per capita trends from 1960 to 2023 for multiple countries using a dataset loaded from a GitHub CSV file. It renders grouped bar charts for each country-year combination, with axes, dashed grid lines, and hover tooltips to highlight values. The code uses D3 v7’s `d3.csv`, `d3.scalePoint`, `d3.scaleLinear`, `d3.axisBottom`, `d3.axisLeft`, and `d3.schemeCategory10` for color encoding, producing an animated SVG view of economic changes over time.