I.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.

Overall

, the number of

households

earning between $50,000 and $99,999 remained relatively stable over the eight-year period,

while

both the lowest and highest

income

groups (below $49,999 and above $100,000) experienced an upward trajectory. Notably, a majority of US

households

had an

income

of $100,000 or more,

while

the $75,000 to $99,999

income

group

was comparatively negligible. The

income

group

below $49,999 showed a minor increase in its numbers. In 2007, there were 25

million

households

earning less than $25,000, slightly fewer than the 27

million

households

earning between $25,000 and $49,999. By 2015, both categories had seen moderate growth, with approximately 28

million

households

falling into each

group

.

In contrast

, the number of

households

within the $50,000 to $99,999

income

range was lower. These figures remained consistent throughout the period, with 21

million

households

earning between $50,000 and $74,999, and approximately 15

million

households

earning between $75,000 and $99,999. The highest

income

group

, earning more than $100,000, experienced the most significant change.

This

group

demonstrated an upward trend, escalating from nearly 30

million

households

in 2007 to a peak of 33

million

in 2015, despite a slight dip to 27

million

recorded in 2011.