"11.4% of respondents had experienced at least one crash that they suspected was due partly to structural weakness".

11.4%?? Are Australian bikes trying to eat their riders?

I live in Flanders, where bikes are used quite a lot for commuting, doing groceries, going to school, all that kind of stuff (less than the Netherlands, probably quite a lot more than many other countries), and also quite a lot for sport. The bikes are a mix between new and old (sometimes very old), and everything in between. Crashes because of structural weaknesses are really exceptional.