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

The bar chart illustrates the portion of households in the US depend on their yearly wage, which was classified into 3 categories,

such

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as less than 25,000 to 49,999 (1); around 50,000 to 399,999 (2); and 100,000 or more (3), in three years selected: 2007, 2011, and 2019. Units are measured in millions.

Overall

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, it can be seen that all groups mostly fluctuated except the income per year in the range

50,000

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of 50,000

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to 99,999 stayed

steadily

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steady

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. The number of

US’

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US

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families in the first and

last

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class rose and fell over the period. The trend of the initial group increased gradually in 2011 from 2007 and had a little decrease in 2015, at around 25, close to 30, and became below 30 but above 25 respectively. The third group started from nearly 30 in 2007,

then

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dropped slightly in the next 4 years and went up to approximately 33 in 2015.

In contrast

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, the second class remained stable, there was an insignificant change.