@cicerone imposter,
Here's a list of per capita GDP by country. The USA is the first country with the mix of demographics and population on that is list. The USA has citizens from all around the world. We represent less than 5% of the world population, but we are the richest in this world. It's based on our freedoms.
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COUNTRY COMPARISON :: GDP - PER CAPITA (PPP)
GDP - per capita (PPP) compares GDP on a purchasing power parity basis divided by population as of 1 July for the same year.
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RANK COUNTRY GDP - PER CAPITA (PPP) DATE OF INFORMATION
1 LIECHTENSTEIN $139,100 2009 EST.
2 QATAR $129,700 2016 EST.
3 MONACO $115,700 2015 EST.
4 LUXEMBOURG $102,000 2016 EST.
5 FALKLAND ISLANDS (ISLAS MALVINAS) $96,200 2012 EST.
6 MACAU $96,100 2016 EST.
7 SINGAPORE $87,100 2016 EST.
8 BERMUDA $85,700 2013 EST.
9 ISLE OF MAN $84,600 2014 EST.
10 BRUNEI $79,700 2016 EST.
11 KUWAIT $71,300 2016 EST.
12 IRELAND $69,400 2016 EST.
13 NORWAY $69,300 2016 EST.
14 UNITED ARAB EMIRATES $67,700 2016 EST.
15 SINT MAARTEN $66,800 2014 EST.
16 SAN MARINO $65,300 2016 EST.
17 GIBRALTAR $61,700 2014 EST.
18 SWITZERLAND $59,400 2016 EST.
19 HONG KONG $58,100 2016 EST.
20 UNITED STATES $57,300 2016 EST.