Billionaires 7 years ago:
https://web.archive.org/web/20171004002738/https://www.bloomberg.com/billionaires/
Billionaires today:
Billionaires 7 years ago:
https://web.archive.org/web/20171004002738/https://www.bloomberg.com/billionaires/
Billionaires today:
Hey, look, I found the thing the US is still number 1 at!