One of the charts on the Australian website shows how several auto-immune disease have been on the increase over the last 20 years e.g ms, diabetes (I recognise that there is still some debate about whether ms is an auto-immune disease).
In the UK it is estimated that around 85,000 people have MS (total population of some 60 million). The UK MS society says that 50 people each weeks are diagnosed (c. 2,500 a year). This annual increase would (if accurate) be lower than the annual increase being seen in Australia.
I think there is some under-reporting (not intentional). The chance of getting ms based on the UK figures is probably 1 in 600 ish. But since my diagnosis, I'm staggered by how many people (friends / colleagues) have said 'my sister, mother, brother has ms' etc. My GP called it a rare disease but seems to be less rare than one might think.
The sort of increase being seen in Australia is certainly alarming (but an 8% annual increase in potential customers will ensure that the CRAB manufacturers do well in the future. Wonder if their prices will reduce?)