According to the World Population review 2020*, the cases of Autism have risen in recent year.
It is difficult to determine how many people are autistic worldwide and it is unclear if the increase in number of cases is due to an increased awareness and changes in diagnosis. There is also a lack of universal criteria to assess Autism due to a broad and diverse spectrum of the condition.
The Autism Spectrum Disorder (ASD) is broad and individuals with the condition can be categorized high functioning, low functioning and everything in between. No single cause has been identified for the condition.
Although there is no cure, early diagnosis is key to improve outcomes.
* http://worldpopulationreview.com/countries/autism-rates-by-country/