This is a simple horizontal bar chart built with D3.js (v3) that visualizes voter turnout across Cologne city districts, sorted in descending order by the `wahlbeteiligung` value. The chart uses SVG rectangles, with each bar’s width proportional to the turnout percentage and its vertical position spaced by index. The code loads data from a CSV file using `d3.csv` and appends tooltips via the SVG `title` element to display each district’s name and turnout. The visualization primarily demonstrates basic data binding, sorting, and attribute manipulation with D3’s selection methods.