The given bar chart illustrates the quantity of US families following their revenue each year in three years 2007, 2011 and 2015.
Overall, it can be seen that the number of households earning between $50,000 to $99,999 remained unchanged, while other income groups tended to fluctuate.
Looking at the chart in more detail, in 2007, the figure for households with an income of less than $25,000 started at 25 million. Moreover, this figure climbed considerably to nearly 29 million in the following 4 years and witnessed a slight decrease by nearly 2 million at the end of the period. There were 27 million families with revenue from $25,000 to $49,000 in the first year, followed by a significant increase to 30 million in 2011 and then dropped marginally of 2 million in 2015. Likewise, a remarkable reduction from 30 million to 27 million in the figure for families in the highest income group between 2007 and 2011. However, it rose substantially and reached a peak of 33 million in the last year.
Regarding the other income brackets, the quantity of families in the income group of $75,000 to $99,999 remained stable during the last 8 years. Similarly, the number of households in the $75,00-$99,999 income ranges still remained constant, at 15 million.
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