There are more billionaires than ever and they are richer than ever too. That’s according to Forbes’ annual ranking of the world’s billionaires, published Tuesday.

There are a record 2,208 billionaires in the world, up from 2,043 in 2017, according to Forbes. And the average wealth of the billionaires is $4.1 billion, a record high.

Taken together, the billionaires of the world are worth $9.1 trillion, up from $7.7 trillion last year, Forbes reports.

“The superrich continue to get richer, widening the gap between them and everyone else,” according to a Forbes statement.

Many of the top spots on the list are held by self-made entrepreneurs.

Amazon founder Jeff Bezos is the richest person in the world with a net worth of $112 billion. Microsoft co-founder Bill Gates is the second richest person in the world with a net worth of $90 billion. Facebook founder Mark Zuckerberg is the fifth richest person in the world, with a net worth of $71 billion.

Indeed, 67 percent (1490) of the world’s billionaires are self-made, according to Forbes.

As the rich get richer, however, economic inequality between the rich and the poor is a problem, according to some of those who hold top spots on the list of the world’s richest people.