He cited one South Korean official who he said estimated the prevalence of autism to be about 1 in 100, 000.

CNN: South Korean study may lead to higher autism estimates

At that same time, the CDC estimated autism prevalence to be about 1 in 150 children and Australian researchers believed it to be around 1 in 160 children.

CNN: South Korean study may lead to higher autism estimates

The prevalence amongst MSM is estimated at 4% in 2007 (4.5 times of the national prevalence).

UNESCO: BC General Assembly to Set the New Leadership for Better Recognition of the Contributions of MSM and TG People in Addressing and Facing Challenges | United Nations Educational, Scientific and Cultural Organization