The number of newly minted and reissued billionaires soared last year, Forbes reported Tuesday in its annual ranking, a staggering accumulation of personal wealth that stands in sharp contrast with the widespread economic struggles unleashed by the coronavirus pandemic. The number of billionaires on Forbes' 35th annual ranking swelled by 660 to 2,755 a roughly 30 percent jump from a year ago " and 493 of them are first-timers. Seven of eight are richer than they were before the pandemic. Forbes calculates net worth by using stock prices and exchange rates from March 5. Amazon founder Jeff Bezos, with an estimated fortune of $177 billion, topped the list. Tesla chief executive Elon Musk came in at No. 2 at $151 billion. As a class, billionaires added about $8 trillion to their total net worth from last year, totaling $13.1 trillion. The United States had the most billionaires, at 724, extending a rapid rise in wealth that hasn't happened since the Rockefellers and the Carnegies roughly a century ago. China ... had the second highest number of billionaires: 698. Gabriel Zucman, an economist ... said in an email that the explosive acceleration of wealth among the richest of the rich has only accelerated during the pandemic. "In the United States, the top 400 wealthiest Americans now own the equivalent 18% of GDP in wealth, twice as much as in 2010 (9% of GDP). The pandemic has reinforced this trend, with a boom in top-end wealth despite the decline in economic activity," he wrote.