Not that I particularly want to get drawn further into this, because you don't listen (and I'm not *saying* you are a bit troll-like, but you are certainly an agitator) but your graph really doesn't tell me enough to answer your question. The numbers of asylum seekers will be reflective of what is happening in the country of origin of the people and in the last 5 years I would suggest that there has been large numbers of people seeking asylum from Africa and the middle east and western asia. Also lets not take away the influence of more people having access to the internet to be able to find ready information on how to get out and who will help them get out. A large portion of this too may be that the people smugglers are just getting better and better at targetting people who will pay for passage. I genuinely feel that the people at the head of a smuggling operation does not give a damn about the policies of the government in question. If they peddle enough lies to enough desperate people, they will make their money back to cover a wrecked boat and the crew, well they were probably nothing more that commodities.
Vicpark, did you ever actually watch Go back to where you came from? It is still available on SBS On demand.