This bar chart displays the 2018 population estimates for the top 10 most populous countries, with country names on the y-axis and population counts on the x-axis. The x-axis uses a custom tick formatter via `d3.format` to abbreviate numbers with suffixes, and gridlines extend across the chart. The visualization is built with D3 v6, using `d3.scaleLinear`, `d3.scaleBand`, `d3.axisLeft`, and `d3.axisBottom`, rendering as SVG. Data comes from the World Population Prospects 2017 dataset.