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 chart illustrates data on the distribution of households in the United States based on their yearly income for 2007, 2011, and 2015.

Overall

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, there were no significant differences in the quantity of families across various income levels over time.

However

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, these figures of groups earning $100,000 tended to increase over time.

Initially

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, the group with incomes below $50,000 had around 25

million

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households. After a noticeable rise in 2011 with nearly 30

million

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, there was a negligible decrease, and the final total was 25

million

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homes

at the end

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of the survey. Notably, throughout the survey period, statistics were consistent amongst the groups with earnings between $50,000 and $74,999 and $75,000 to $99,999, with approximately 20

million

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and 15

million

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, respectively. The group's annual income exceeded $100,000, starting at nearly 30

million

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in 2007. After a slight decrease in 2011, there was a massive jump to the highest point of 34

million

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in 2015.