Barq's Root Beer has Caffeine In it. Barq's Has Bite! The bite being the Caffeine
It's on the label...
The exact number is not known, because there are a lot of breweries who are brewing their own beers (some beers come and some go). It has to be around a thousand different brands.
There are about 1300 breweries in Germany.
No it is not but Dr pepper is good