Three interactive bar charts show employment rates for female and male groups across three Olympic years. Buttons for 2008, 2012, and 2016 trigger updates that transition the bars with a 1000-millisecond animation using D3 v6’s `transition()` method. The SVG chart uses `d3.scaleBand` for the categorical x-axis, `d3.scaleLinear` for the y-axis, and a data join pattern with `enter`, `merge`, and `exit` selections to handle changes. The page loads D3 from a CDN inside a React wrapper.