The bar chart illustrates the number of households in the United States by their annual income in 2007, 2011, and 2015. The income categories range from less than $25,000 to $100,000 or more.
Overall, the number of households earning $100,000 or more increased significantly during this period, while the number of those earning less than $25,000 also rose slightly. In contrast, most middle-income groups showed relatively stable or slightly changing trends.
In 2007, the highest number of households belonged to the $100,000 or more group, reaching around 29 million. This number slightly decreased in 2011 but rose again to over 32 million in 2015, making it the highest in that year. Households earning less than $25,000 increased from around 25 million in 2007 to about 29 million in 2011, then dropped slightly to 27 million in 2015.
Households earning $25,000 to $49,999 rose steadily from 26 million in 2007 to 30 million in 2011, before declining to 28 million in 2015. Meanwhile, the $50,000–$74,999 group remained almost the same throughout the years, at about 21 to 22 million households.
In conclusion, the chart shows that wealthier households increased, while lower- and middle-income groups had mixed trends.