This interactive stacked bar chart shows the gender distribution of students (female vs. male) across various university modules, using data from a CSV file. It displays the count of each gender per module, with a radio-button toggle that switches the y-axis between absolute counts and percentage-based proportions. The visualization is built with D3.js, using the `d3.layout.stack` API to stack the bars and `d3.svg.axis` for axes. Smooth transitions animate the change between count and percent views via the `.transition()` function.