This bar chart displays the average share of renewable energy production across EU member states per year, with exact percentages revealed on hover. It loads a CSV file from a GitHub gist using `d3.csv`, then renders SVG rectangles scaled by `d3.scaleBand` for the x-axis and `d3.scaleLinear` for the y-axis. The chart includes axis labels, a title, and CSS-driven hover interactions that change bar color and display the numeric value.