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 illustrates the number of families in the US grouped by four different yearly pay in 2007, 2011 and 2015.

Overall

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, the upper-class citizens saw significant changes among the other groups,

while

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the middle-class households remained stable during the span. The people with annual earnings less than $25,000 and $25,000-$49,999 saw

slight

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a slight

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fluctuate

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during the term, from 25

million

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and just over 25

million

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respectively in 2007 to around 28

million

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and 29

million

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in order in 2015.

Family

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Families

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with yearly

salary

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salaries

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of $75,000-$99,999

also

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experienced small

fluctuation

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fluctuations

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during the period, from just below 15

million

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in 2007 to exactly 15

million

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in 2015. The only group that changed dramatically was that whose annual compensation of $100,000 or more, started from just below 30

million

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in 2007,

then

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slightly decreased in 2011 before skyrocketing to about 33

million

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in 2015. They whose annual income of $50,000-$74,999 was the only group that kept steady at just over 20

million

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over the interval.