Elon Musk remains the richest person in America, for the second year running. At an estimated $251 billion, he’s worth exactly the same as last year—and $90 billion more than second-place Jeff Bezos, who’s worth an estimated $161 billion.

Elon Musk, CEO of SpaceX and Tesla, was born in South Africa, but always wanted to move to the U.S. And at age 17, he arrived in North America with only $2,000, a backpack and a suitcase full of books. Today, he is worth $36.8 billion.