This bar chart displays the number of employed STEM workers in the U.S. per quarter during 2022, using horizontally oriented bars. The visualization uses React with D3 v5, employing `scaleBand` and `scaleLinear` for the axes and bar widths. It loads CSV data from a GitHub gist, truncates it to 12 rows, and renders SVG rectangles alongside custom tick marks. Red vertical gridlines and axis labels are drawn manually, with the chart embedded in a fixed 960×500 SVG canvas.