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 provides the number of

households

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households'

household's

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annual income in the US.

This

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diagram illustrates the comparison in the following year: 2007, 2011 and 2015. Referring to the chart diagram, those figures gradually changed in these three years. As the $50,000-$74,999 of

group

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households increasing performance was nearly tied in these three years, the $75,000-$99,999 of

group

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as well.

Then

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, the less than $25,000 and $25,000-$49,999 of the

group

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was beyond the $100,000 or more of the

group

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in 2011, it reached the 30 million. Surprisingly, in 2015, the $100,000 or more of of

group

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dramatically increased the number

than

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to

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2011, and the performance

also

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reached a peak.

Overall

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, the whole number of households compared with 2007's figure, till 2015, the figure subtle increased

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in

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2015. Particularly, the the $100,000 or more of of

group

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is the highest performance in

this

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diagram.