The only way that graph could be accurate for Sweden is if any non-canned beer counts as refillable. I say that with absolute certainty since we have a state monopoly and government stores with the same stuff in them across the entire country.

Glass bottles don't get refilled, they get recycled.

I'm assuming refillable means growlers and the like. Anecdotal, but with the spread of microbreweries over the last 10-20 years, the number of beer drinkers I know buying theirs that way has greatly increased. Maybe I'm biased because I'm a beer nut (and brewer) though.