This visualization shows the UK unemployment rate from 1971 to 2025 as a line chart, with a hover tooltip displaying the year and exact rate for each data point. The chart uses D3.js v7's `scaleLinear`, `line`, and `axisBottom`/`axisLeft` to render the line and axes within a React component. The data comes from a CSV file containing annual, quarterly, and monthly unemployment figures, and the visualization filters the data to include only annual entries. The code implements interactive hover detection using transparent circles, making the tooltip and highlight circle appear when the cursor is near a data point.