The Gap

When I think about the rising cost of food, I think about how it affects some more than others, which makes me wonder about the gap between the rich and the poor in this country.

I saw this in The Economist today:¹

"Income distribution in America is the widest of the 30 countries of the OECD. The top 10% (or decile) of earners have an average $87,257 of disposable income, while those in the bottom decile have $5,819, among the very lowest of any country."

I'd like to see how the income gap in this country has changed over the years. I feel it's getting bigger, if that's possible.
________¹ The Economist: Where The Gap Between Rich And Poor Is The Greatest