Why has autism dramatically increased in children, are vaccines to blame?

autism rates used to be one child in 25,000. Today, it is one child in 50. How much does mercury laced vaccines, GMOs, fluoride in water and tp, msg, and other additives that seem to be for the purpose of depopulation play a part in the dramatic rise ?
Update: so you guys want to trust the FDA, the same government organization that lets pink slime into your hamburgers and viox into your medicine cabinets ?
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