I think 1 in 36 kids having autism is similar to how breast cancer diagnosis shot up when we had better imaging ability or when we figured out prostate cancer was actually fairly common in older men but not usually something worth doing anything about. When we merged in aspergers and autism together that obviously makes autism rates higher and as research continues on diagnosing autism it makes sense rates increase from there too? I mean in the past we thought autism was only common in boys!