These types of stats about Americans are a bit misleading. It almost implies that American's are dumb or something. The fact is that 90% of American's know what HTML is. I bet that's higher than most countries if not nearly most.
Does this mean that 1/1000 people on Earth know what HTML is?
Article does not say 90% of Americans know what is HTML. They might have given other wrong answers or simply answered 'I don't know'.
Imho, articles implies that Americans start bullshitting if they don't know what something is, however I don't think this is any different for other countries.
>Do 1/10 people on Earth even know what an STD is?
STD is an abbreviation in English language. I am pretty sure more than 1/10 people on Earth knows that there are sexually transmitted diseases but may not be aware that is is called STD in English.
Does this mean that 1/1000 people on Earth know what HTML is?
Do 1/10 people on Earth even know what an STD is?