This animated bubble chart visualizes BMW sales volumes from 2010 to 2024 across selected countries and car models. A play/pause control and checkboxes let viewers filter by region and model while a year counter animates the timeline. The visualization uses D3 v7's `d3.csv` to load data, `d3.select` for DOM selection, and `d3.rollups` for grouping, rendering SVG bubbles whose size corresponds to sales figures.