This Sankey diagram visualizes the flow of German voters between the 2013 and 2017 federal elections, tracking movements between parties, non-voters, first-time voters, and those who moved or died. The diagram uses the d3.sankey plugin to render the alluvial flow, with node width and padding configured for clarity. Hovering over a link displays its exact value and percentage of the source node, while hovering over a node shows a breakdown of all incoming and outgoing flows. The tooltips are built with d3.select and styled via CSS, and the data is loaded from a local CSV file using d3.csv.