14. Singapore: 21 billionaires
Wee Cho Yaw is the largest shareholder and chairman emeritus of United Overseas Bank and has a net worth of $8 billion.
13. Spain: 25 billionaires
Amancio Ortega is the founder and former chairman of Inditex fashion group and has a net worth of $77.8 billion.
12. Turkey: 29 billionaires
Ferit F. Sahenk is the chairman of Doğuş Holding and has a net worth of $2.2 billion.
11. Japan: 33 billionaires
Tadashi Yanai is the chairman and biggest shareholder of Fast Retailing, the largest clothing retailer in Asia, and has a net worth of $17 billion.
10. Switzerland: 35 billionaires
Ernesto Bertarelli inherited drug manufacturer Serono and has a net worth of $15.7 billion.
9. France: 39 billionaires
Bernard Arnault is the chairman of LVMH Moet Hennessy Louis Vuitton, the world's largest maker of luxury goods, and has a net worth of $56.2 billion.
8. Italy: 42 billionaires
Giovanni Ferrero controls candy company Ferrero Group and has a net worth $23.3 billion.
7. United Kingdom: 55 billionaires
Jim Ratcliffe is the founder and majority owner of chemicals manufacturer Ineos and has a net worth of $9.8 billion.
6. Hong Kong: 69 billionaires
Li Ka-Shing controls infrastructure conglomerate CK Hutchison Holdings and real estate development company Cheung Kong Property Holdings and has a net worth of $34 billion.
5. Russia: 96 billionaires
Alexey Mordashov is the main shareholder and chairman of steelmaker Severstal and has a net worth of $19.1 billion
4. India: 100 billionaires
Mukesh Ambani is chairman, managing director, and largest shareholder of Reliance Industries Limited and has a net worth of $40 billion.
Germany: 117 billionaires
Susanne Klatten inherited her parents' stake in luxury automaker BMW and is worth $22.7 billion.
China: 318 billionaires
Wang Jianlin is the chairman and founder of Dalian Wanda Group and has a net worth of $28.2 billion.
United States: 563 billionaires
Warren Buffett is a legendary investor and the chairman of Berkshire Hathaway and is worth $81.6 billion.