The bar chart depicts how many families and their yearly salaries( in millions) by the annual earnings for the years of 2007, 2011 and 2015. There are five ranges of wages: less than 25,000 , 25,000-49,999,50,000_74,999,75,000-99,999 and over 100,000
Overall, it is easy to see that the number of households earning less than $75,000 per year rose slightly to 2011 before decreasing in 2015 whereas the families making money over $75,000 per year witnessed the reverse changes over the period of 8 years.
In 2007 , the number of families whose annual income was less than $25,000 ,$25,000-$49,999 and from $50,000 to $74,999 , started with around 25 million , 27 million and 22 million respectively before increasing slightly to 28 million, nearly 30 million and 23 million in turn in 2011. Finally, those figures have a decrease to 27 million , 28 million and 21 million respectively in 2015
By contrast, from 2007 to 2011 , the figures for $75,000 -$99,999 and over $100,000 illustrate the reverse change , it fell slightly from 14 million to 13 million and from 29 million to 26 million respectively. After that, it have an increase to 33 million 15 milliom and 33 milliom respectively in 2015.