This bar chart displays the populations of sub-Saharan African countries in 1950, based on data from the United Nations World Population Prospects 2017. Each bar’s length is proportional to population in thousands, with country names listed along the vertical axis. The visualization is rendered as an SVG using d3.v5, leveraging `scaleLinear` for the x-axis, `scaleBand` for the y-axis, and `axisLeft` and `axisBottom` for gridlines. Data is loaded from a CSV file and processed with the `csv` method.