Not unusual at all for Belgian beers. If you have a chance get and read Brew Like a Monk. It goes into great detail about bottling with fresh yeast. They do it for flavor profile and to help carbonate the beers. The beers this is used for are usually bottle conditioned for some time. The fresh yeast helps that process.
A 2006 study found that the average American walks about 900 miles a year.
Another recent study found that Americans drink an average of 22 gallons of beer a year.
That means, on average, Americans get about 41 miles per gallon.