The chart below shows the number of households in the US by their annual income in 2007, 2011 and 2015.

The bar chart gives information about how many American

families

with their yearly salaries in the years 2007, 2011 and 2015.

Overall

, the

income

groups below $49,999 and above $75,000 experienced a rising trend and had some fluctuations,

while

the

income

group

between $50,000 and $74,999 remained steady. In 2007, the number of

families

which earned over $100,000 were the largest, after four years, those

families

who received between $25,000 and $49,999 outraced it and became the biggest one.

However

, the highest

income

group

turned into the largest one again. The

families

who earned less than $49,000 showed a considerable increase. By 2007, there were 25

million

families

earning under $25,000 slightly fewer than the 27

million

households receiving from $25,000 to $49,999. By the year 2015, both categories grew gradually, with approximately 28

million

households in each

group

.

In contrast

, the number of households whose

income

was between $50,000 and $99,999 was lower. These figures had a tiny change, which was under one

million

. The highest

income

group

with over $100,000 had the most significant change. During the period from 2007 to 2011, it went down to just under 30

million

. After that, it rose to about 33

million

.