Fork of Persons of Concern StreamGraph by Origin
This streamgraph visualizes the total number of persons of concern—including refugees, asylum-seekers, and internally displaced persons—grouped by country of origin, from 1951 to 2015. The chart uses a wiggle offset to show changes in each country’s contribution over time, with labels positioned by the `d3-area-label` library. Data comes from UNHCR Population Statistics, filtered to exclude countries with low total counts. The SVG rendering uses D3 v4 APIs including `d3.stack`, `d3.stackOffsetWiggle`, and interactive hover effects that highlight individual paths.