There are many factors involved no doubt.
For a start - the most numerously owned breeds are more likely to be represented simply because there are more of them.
German Shepherd, Border Collie, Labrador, Staffie, ...
Interesting that the Staffies are high on the list - as they are generally well regarded as a family dog. Just thinking out loud - it may reflect on a segment of society that might tend to have a staffie as a dog, and how likely they are to 'parent' their dog responsibly.
Also there may not be uniform reporting, and/or the reporting likelihood is proportional to the damage caused - so small dogs may be under-reported compared to the actual number of aggressive incidents because - the damage is less, people maybe don't 'take them as seriously', ...
Popular breeds that don't appear high on the list would be a good sign, and the contrary point ... dogs that aren't owned much but are higher on the list should indicate a warning sign.
I wonder if "Husky" (which could mean a few things) even being on the list from 2007 is related to the movies Snow Dogs(2002) and Eight Below(2006). Sometimes breeds get 'trendy' for a while.
Finally - I don't know how well analysed these incidents are by the authorities - perhaps it is getting better these days. The Dog Law in WA refers, or used to, a "vicious dog" at some stage. That is a fuzzy and undefined concept that should be avoided and the details of the incident analysed by qualified experts.
Many dogs - even if they "bite" for whatever reason - can exhibit great control over how they use their mouths. Newspaper reports certainly don't (usually) distinguish between an incident that causes bruises vs light punctures vs deep punctures vs wounds that have torn from side to side from the dog shaking while biting.
A Veterinary Behaviourist that we have heard lecture described an example of a dog that had taken hold of a child's arm - and had held it such that the skin was not being punctured - but the skin was torn in the (understandable) panic in wrenching the dog away from the child. I'm not trying to dictate my own views - just point out that there are possible considerations we as a society could choose to take into account - or not - in such situations.
I am a massive dog lover and long-term dog-trainer - and have worked for many years at behavioural modification with dogs. I am very very sorry to hear about this attack - but also part of me always wonders what the exact circumstances were and how it came about. My default gut feeling is that in many cases it is the dog owners that haven't taken steps to understand their dog, what they can handle and what they can't, to control them properly and take responsibility for the safety of their dog and everyone that interacts with it.
I don't want to minimise the incident at all. I (speaking personally) would like to be sure that if a dog is destroyed that it was indeed necessary, and also that if the owners - or even conceivably the visitor/etc - did not act responsibly that they be held appropriately responsible also.
Dogs are a huge part of the lives of many families - I have the figure of 70% in my head - and there should be more facilities for dog owners, better education and training available, and appropriate laws that will encourage people to get their dogs out and about and learning safely to interact with adults, children, other dogs, etc.
Sorry to go on.
Paul.