The chart below shows the number of households in the US by their annual income in 2007 2011 and 2015 Summarise the information by selecting and reporting the main features and make comparisons where relevant

The bar chart illustrates the yearly income of the number of households in the United States in 2017,2011 and 2015.
Overall, the income was stable in the given period and the highest income was increase at the end of the period.
In both 2007 and 2015, the largest category included households earning at least 100,000$, reaching approximately 30 million and 33 milliion households. The second-largest in 2007 and 2015 were earning 25,000$-49,000$, both consistently reach 25 to 28 million households.
However, the trend was changed in 2011, 28-30 million households made roughly 25,000$-49,000$, while about 27 millions households had a yearly income of 100,00$. In 2007, 25 million households made below 25,000$, increasing to 29million in 2011 and keeping stable in 2015.During the given period, around 20 million households having a income of 50,000$ to 74,000$ and roughly 15 million households making 75,000$-99,000$.