The bar chart illustrates the number of US households grouped by their annual income from 2007 to 2015.
Overall, annual income increased throughout the timeframe particularly for the wealthiest income bracket, whereas the middle and higher income categories witnessed unnoticeable changes.
In 2007, almost 30 million households earned $100,000 or more, which was double that of the $75,000 – $99,999 bracket (just under 15 million). Following this, the less than $25,000 and $25,000 – $49,999 categories accounted for 25 million and around 26 million households respectively. Moreover, around 21 million had earnings of $50,000 to $74,999.
By 2011, there was a decline in the wealthiest bracket, comprising
approximately 27 million households. The less than $25,000 and $25,000 -$49,999 groups both witnessed a rise to just under 30 million. The middle-income bracket saw no changes and the $75,000 -$99,999 category dipped slightly.
The wealthiest households rose
considerably at around 33 million by 2015, while the two lowest earning categories declined to around 26 million. There was a moderate rise for the second-highest earning households, and the $50,000 to $74,999