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.

A glance at the column graph delineates information about the commensurability of various American households by their income per annum in the threefold

years

2007, 2011, and 2015.

Overall

, it can be explicitly perceived that the gained wealth was divided into five categories, accompanied by the highest proportion for either $25000-$49000 or $100000 or more groups,

while

the least in $75000-$99000 quad. Concerning the

years

2007 and 2015, the number of chores by average annual income of $100000 or more has the maximal enthusiasts in 2015 by staggering approximately 33

million

, the first-ranking category in 2007 just under 30 M, too.

This

was followed by the $25000-$49999 group for the

years

2007 and 2015, somewhere in the vicinity of 27

million

and 29

million

, respectively. Tertiary position in 2007 and 2015,

however

, was allocated to a relatively lower earning, under 25000 dollars, with the amount of 25

million

in the former and 28

million

in the latter. Meanwhile, the income per year in $25000-$49999, less than $25000, and $100000 or more groups had a different scenario, with the number of approximately 29

million

, 28

million

, and 27.5

million

, respectively. It is noteworthy that the $50000-$74999 category fascinated proponents with the penultimate values before the

last

group of $75000-$99999 common among these

years

.