The chart below shows the number of households in the US by their annual income in 2007,2011 and 2015.

The given chart highlights information about how much money was earned by American families annually in three mentioned years; 2007, 2011 and 2015.

Overall

, it can be seen that none of them experienced a dramatic change with the exception of one category that remained stable. Looking at the details, the lowest

wage's

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wage

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figure started at 25 but

then

it increased to 28 and

finally

levelled off

approximately

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at approximately

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25 in 2015. Followingly, the second cash gang from 25,000$ to 40,999$,

it

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apply

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fluctuated marginally but

it

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apply

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hit a peak at 30 in 2011.

Furthermore

, the average salary swarm which was between 50,000$ and 74,999$ levelled off at 20 over the period in question. As for the

forth

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fourth

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category (75,000$_99,999$), it embarked on under 15 and continued to dip in 2011 and in the

last

year it hit a peak at 15.

Moreover

, the highest

income's

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income

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figure launched at around 28 but

then

there was a slight decline in 2011 but it improved significantly in 2015.