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.

The chart illustrates how many

households

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in the US were categorised by yearly

income

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in 2007, 2011, and 2015. Units are measured in millions.

Overall

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, the amounts in each sector were relatively stable. The difference was in the highest

households

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in each period, where in 2011, the biggest category was different from those in 2007 and 2015. Starting in the first period, there were fewer than 15

million

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households

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with incomes between 75 and 99,999, making it the lowest.

Then

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, for the category from 50 to 74,999, it was more than 20

million

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people, followed by fewer than 25

million

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people with an

income

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of less than 25 thousand. Around 27

million

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had an annual salary between 25 and 49,999,

whereas

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the highest annual

income

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was

also

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witnessed by a large number of

households

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, almost 30 thousand. In 2011 and 2015,

households

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with a salary between 50 and 74,999 weren't changed, nor was the range from 75 to 99. In 2011, less than 25

income

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experienced a significant increase to almost 30, similar to the 25 to 49,999 sector.

Then

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, two of them

also

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decreased moderately in the final period, even though they were still above 25. For the category of more than 100 thousand, in 2011, it was surpassed by others and dropped to between 25 and 30, before significantly rising to around 32.