well the prevalence of autism (including Asperger's and PDD NOS) is 1 in 166 2/3 (6/1000) and the estimated population of Australia for 10 September 2011 is 22702206 so there are approximately 136213.236 people in Australia living with an autism spectrum disorder.
none
None - autism is a neuological difference, there's nothing about autism that could cause death.
There are thousands, maybe millions of people have autism. There are some people who don't know they even have it! So, it's safe to say, there are a lot of people with autism in this world.
10
I don't know how many people have seizure disorders that are on the autism spectrum. I have when I was experienced it as a small child. There is truly no knowing how many people nowadays in the autism spectrum have seizure disorders.
Autism is not mental or physical per say, nor is it always a disability. Autism is a neurological difference - some people with autism do consider themselves disabled because of the way autism effects them, but many autistic people live just like neurotypical people so do not consider their autism to be a disability at all.
Of course they can. Children with Autism can reach whatever career they choose. Temple Grandin is a very famous person with Autism, and she has written many great books about Autism.
No one 'gets' autism, it's not a disease someone can catch - autism is a neurological difference, Autistic people are born Autistic. Currently rates of diagnosis are around 1 in 55, but we have no way of knowing for sure how many people may be Autistic but not diagnosed.
Autism awareness is simply making people aware of autism and Autistic people. Unfortunately organizations such as Autism Speaks uses autism awareness to speak negatively about autism and Autistic people to increase their profits, thus there remains a lot of ignorance about autism.
100-800
It would not be ethical or legal to do anything TO people who have autism.
Yes people with autism do repeat them self's.