The provided bar graph illustrates the distribution of US households by their annual income across three distinct time periods: 2007, 2011, and 2015.
The graph reveals a mixed trend, with some income categories demonstrating stability, while others exhibit significant changes over the examined period.
Upon closer examination, it becomes apparent that the middle-income categories, specifically those earning between $25,000 and $49,999, and those earning between $75,000 and $99,999, exhibit a remarkable stability, with minimal fluctuations across the three surveyed years. The former category maintained a consistent level of around 25 million households, while the latter retained a steady level of slightly over 25 million households.
In contrast, a notable change is observed in the highest income category, comprising households with an annual income of $100,000 or more. This group experienced a slight decline, followed by a significant surge, reaching a peak of nearly 35 million households in 2015. This upward trend is the most discernible change across the surveyed period.
