This chart displays the distribution of deaths across eight age ranges, from newborns to those over 70, for nearly twenty different causes of death. Animated stacked bar charts show raw death counts or the percent share each age group contributes per cause, with a toggle to switch between these views. The visualization is built with D3.js, using `d3.layout.stack` to compute the stacked segments and transitions to animate the bars between count and percentage modes. Data comes from CSV files loaded via `d3.csv`, and the legend identifies each age range by color.