This example shows a bar chart of monthly values over time, with each bar representing a data point from a CSV file. The chart displays dates on the x-axis and dollar values on the y-axis, using rotated tick labels for readability. It employs D3.js version 3.5.17, specifically `d3.scale.ordinal`, `d3.scale.linear`, `d3.svg.axis`, and `d3.csv` to load and render the data as SVG rectangles. The bars are styled in steelblue and the axes include custom margins and formatting.