This example shows the cumulative number of events by year from 1949 to 2019, using a bar chart that grows in height as the running total increases. The visualization loads CSV data and renders it as SVG rectangles, using D3 v5 scales (`d3.scaleLinear`, `d3.scaleBand`) and axes (`d3.axisBottom`, `d3.axisLeft`). The bars are colored steelblue and positioned via the scale’s range band, with the chart drawn inside an `<svg>` element using a margin convention.