Fwiw I recently bought helmets for my family. There is a bit of an uplifting trend for helmets, since a popular tv show spent some time promoting them. Or better, spent some time on the ridiculousness of not wearing helmets while cycling.
That's really interesting! And, I guess I think, good for you!
Right after writing my post above I had to google "dutch bike helmets" and found stuff like [1] which really makes it very clear that you (as a nation, I mean) just really aren't much into helmets. Cool that there are exceptions, although of course there always are at this level. :)
I grew up and still live in the Netherlands.