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 diagram depicts the total of US families by annual salary in three periods (2007, 2011, and 2015).

Overall

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, in 2015, more family circles earned more than $75,000 compared to the former two years. The $50,000 - $74,999 earnings had the unwavering total of households over the period given as opposed to the groups with less than $49,999 wage, showing a growth pattern. More than a third of families had a $100,000 or above revenue, four

million

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higher than in 2007.

Although

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homes earning $75,000 - $99,999 witnessed a decrease in 2011, the number grew by the period ending at 15

million

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.

On the other hand

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, the third category, $50,000 and $74,999 annual earnings, remained unchanged, just above 20

million

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in the three periods. The houses with the lowest profit, less than $25,000 - $49,999, started at 25

million

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and about 27

million

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, respectively, which experienced an increase before falling in the subsequent period, hitting 28

million

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on average.