The average American buys a whopping 170 liters of soda in the course of a year.
From Americans Drink More Soda Than Anyone Else ( via Soda Planet )
That would be nearly half a liter per day for every person in America on average.
As I’ve gotten older my soda consumption has dropped significantly. I can count on my fingers the number of times I have a soda in a year. On the flip side, I drink lots of water.