The bar chart illustrates the yearly earnings of US households in 2007, 2011 and 2015.
Overall, the number of households with the highest income was above other compared families, despite fluctuations, while the amount of medium-income families showed the lowest data and stayed almost stable during given years. However, a small increase could be seen in those who earned less than $ 49,999 at the end of the given period.
Looking for more details, the number of households with the highest incomes was more than other classes in 2007 and 2015 with 30 million and 35 million respectively, whereas they were less than low-income people in 2011. People with lower income had seen an obvious rise of 5 million between 2007 and 2015. Figures for families who earned up to $49,999 per year was around 25 million in 2007, and they reached approximately 30 million, which was their highest number, in 2011.
On top of that, middle-income people whose salaries were between $50,000-$74,000 and $75000-$99,000 remained nearly the same with about 20 million and 15 million respectively.