Forbes magazine reveals the top 10 richest billionaires in the world for 2016. Their 30th annual list features 1,810 billionaires around the world with a total net worth of almost $6.5 trillion. This year marked the first time the average net worth of a billionaire dropped -- to $3.6 billion, down $300 million from last year. The U.S. has 540 billionaires.
Click through to see the top 10.
9. David Koch (tied)
Executive Vice President, Koch Industries
Age: 75 Net worth: $39.6 billion
9. Charles Koch (tied)
CEO, Koch Industries
Age: 80 Net worth: $39.6 billion
Credit: Patrick T. Fallon/The Washington Post via Getty Images
8. Michael Bloomberg
Age: 74 Net worth: $40 billion
7. Larry Ellison
Co-founder and CEO, Oracle
Age: 71 Net worth: $43.6 billion
Credit: Kimimasa Mayama/Pool, AP
6. Mark Zuckerberg
Co-founder, chairman and CEO, Facebook
Age: 31 Net worth: $44.6 billion
Zuckerberg made the top 10 for the first time and is also the youngest of the bunch. He made the biggest gains this year, adding $11.2 billion to his fortune.
Credit: Kay Nietfeld/picture-alliance/dpa/AP Images
5. Jeff Bezos
Age: 52 Net worth: $45.2 billion
Bezos also appeared on the top 10 list for the first time this year.
Credit: Phelan M. Ebenhack/AP
4. Carlos Slim Helu
Chairman and CEO, Telmex and América Móvil
Age: 76 Net worth: $50.6 billion
Credit: Salvatore Di Nolfi/AP
3. Warren Buffett
Chairman and CEO, Berkshire Hathaway
Age: 85 Net worth: $60.8 billion
2. Amancio Ortega
Age: 79 Net worth: $67 billion
Credit: Xurxo Lobato/Getty Images
1. Bill Gates
Age: 60 Net worth: $75 billion
Gates has secured the number one spot for three years in a row and 17 out of 22 years.