A risk analyst is comparing two quantitative risk scenarios for a board presentation. Both scenarios have an identical annualized loss expectancy (ALE) of $500,000. However, Scenario A involves frequent, small, predictable losses, while Scenario B involves a rare but catastrophic single loss event. The board asks the analyst which measure best captures the difference in risk between the two scenarios that a single ALE figure hides. Which additional analysis output should the analyst emphasize?