This 3D bar chart visualizes public transport usage across six countries for each year from 2014 to 2019, with columns grouped by country along the x-axis and stacked by year along the z-axis. The chart uses the Highcharts library with its highcharts-3d module, enabling a perspective view through the options3d configuration (alpha, beta, and depth). Each series represents a year, and the data is provided as arrays of [category index, value] pairs. The chart also includes styled axes labels and a title, all rendered on a simple HTML page with a blue background.