Total Number of Rockets Throughout The Years
This visualization shows the total number of rockets launched per year, with the color of each bar indicating the rocket’s company country of origin. It uses Vega-Lite’s API to aggregate the data by year and country via `groupby` and `count`, rendering a bar chart with a tooltip for exact counts. The data is loaded from a CSV using `d3.csv` in `getData.js`, and the chart is styled with a custom color palette and axes through the `config.js` object. The visualization is built with Vega-Lite, Vega, and d3, and runs as a full-screen interactive SVG.