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 chart classifies US

households

into five

income

brackets

for 2007, 2011 and 2015.

Overall

,

income

distribution among US

households

displayed similar patterns in these three years, with significantly more

households

in both the highest and the

two

lowest

income

brackets

than either of the

two

middle-

income

brackets

. In both 2007 and 2015, the largest category consisted of

households

earning at least $100,000, reaching approximately 30

million

and 33

million

households

, respectively. The

two

second-largest groups in 2007 and 2015 were those earning under $25,000 and those earning between $25,000 and $49,999. They both consistently comprised 25 to 28

million

households

.

However

, 2011 saw a different trend, as the

two

lowest

income

ranges each contained a greater number of

households

than the highest range. In that year, 28-30

million

households

made either below $25,000 or $25,000-$49,000,

while

around 27

million

households

had a minimum

income

of $100,000. Those falling into the

two

middle-

income

brackets

remained the smallest groups in all three years, with around 20

million

households

consistently having a yearly

income

of $50,000 to $74,999, and roughly 15

million

households

making $75,000 to $99,999.