In 2004,three to Six Children Out of 1,000 Displayed Symptoms

In 2004,three to six children out of 1,000 displayed symptoms of autism.
A) Explain why this number rose dramatically from previous rates dating back to the 1990s.Would you expect this number to continue to rise over the next five years or would you expect it to level off? Explain your response.
B) How is the dimensional approach effective in diagnosing autism? Be specific.(Hint: Describe how Asperger's syndrome differs from what many would consider "classic" autism.)