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

The provided chart delineates the distribution of households in the US based on their annual income levels in the years 2007, 2011, and 2015.

In general, households earning between $75,000 and $99,999 exhibited the lowest figures, albeit with a slight uptick. Conversely, households with an annual income of $100,000 experienced an increase, except in 2011.

In 2007, the highest number of households, just under 30 million, belonged to the $100,000 income bracket, followed by those earning between $25,000 and $49,999, and less than $25,000, at 27 million and 25 million, respectively. However, in 2011, there was a notable surge of approximately 5 million in the latter two groups, while the former still peaked at around 37 million.

Conversely, the households earning between $50,000 and $74,999 remained relatively stable, at slightly above 20 million. Notably, the number of households earning between $75,000 and $99,999 increased from under 15 million to 15 million, although it remained the lowest among the income brackets.