From an Australian campaign against mandatory bicycle helmet laws:

(YouTube, via)

They picked a perfect analogy. Here in Germany, the number of people drowning and the number of people dying in bicycle accidents, repsectively, has the same order of magnitude: a few hundred a year. Both cycling and being around water are everyday activities for most of us, and the overall risk remains pretty low. Yet in one case we frequently discuss the need for protective gear as if it were particularly dangerous, while in the other, we just shrug it off—if the matter comes to our attention at all.