7. Israel – 10
Many studies in Israel have shown that autism is not connected to vaccines, but they have also shown that the autism rate is decreasing in this country. They found that autism in their country is connected with genetic, but also food, preservatives in processed food and some drugs. These claims might be the reason for the decrease of these numbers, due to changing the ways of processing food and prescribing the drugs, so it is good to say that in last 20 years since the first research was done, the number of children with autism has dropped by 40%.