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, andmake comparisons where relevant.

The bar chart compares the number of

households

in the US across five ranges of

salary

per year between 2007 and 2015.

Overall

, what stands out from the graph is that the number of

households

with an annual

income

of over 100000

USD

remained the highest in 2007 and 2015. Another striking feature is that

households

earning between 25000 to 49999

USD

became the highest in 2011. In 2007, the respective number of

households

which make less than 20000

USD

, from 25000 to 49999

USD

and 100000

USD

or more was 25

million

, around 27

million

and below 30

million

. Over the following eight years, the figure for

salary

range less than 25000

USD

and

salary

from 25000 to 49999

USD

saw a slight increase to around the same point, at approximately 28

million

. By 2015, the statistic for an annual

income

of over 100000

USD

rose significantly, reaching a peak at over 33

million

. The other two ranges of

salary

throughout the same period were 75000 to 99999

USD

and 50000 to 74999

USD

. In 2007, there were around 15

million

and over 20 respectively. From 2011 to 2015, the figure for

income

50000 to 749999 remained fairly stable, hovering at over 20

million

,

while

the figure for the other

income

range fluctuated steadily, and levelled off at 15

million

.