NEW YORK – Mexico's Carlos Slim remains the world's richest man for the fourth year in a row, according to Forbes, while Warren Buffett dropped out of the top three for the first time since 2000.

And Facebook's Mark Zuckerberg saw his ranking drop 31 spots as his net worth declined by $4.2 billion.

A record 1,426 people around the world made Forbes magazine's latest annual tally of billionaires, up 16 percent from last year. Their average net worth was $3.8 billion, rising 3 percent from 2012. The total net worth for the list's billionaires was $5.4 trillion compared with $4.6 trillion a year ago.