Test You "Caffeine IQ"!

Think you're caffeine savvy? Take this short quiz and find out your Caffeine IQ!
In what decade was cola first introduced?
How many plants contain caffeine?
TRUE or FALSE: Energy drinks contain more caffeine than a typical cup of coffee.
People of which ethnic derivation are believed to have greater sensitivity to caffeine?
Where was tea first brewed as a beverage?
What percentage of Americans say they consume caffeine daily?
Which country consumes the most coffee in the world (per person)?
After water, which beverage is the world's most widely consumed?
Which substance in the brain, which causes drowsiness, is blocked by caffeine, producing its stimulating effect?
Which country produces the world's most coffee?