This pie chart shows the distribution of survey respondents by experience level, with each slice labeled by category and count. The visualization loads CSV data from a GitHub gist, uses `d3.rollup` to tally occurrences per level, and renders the chart with `d3.pie` and `d3.arc` in an SVG. Slice colors come from `d3.schemeCategory10`, and labels are positioned at each arc’s centroid. The chart is built with D3 v7 and displays a static, unanimated view of the categorical breakdown.