Globally, autism is estimated to affect 21.7 million people as of 2013.[13] As of 2010, the number of people affected is estimated at about 1–2 per 1,000 worldwide. It occurs four to five times more often in boys than girls. About 1.5% of children in the United States (one in 68) are diagnosed with ASD as of 2014, a 30% increase from one in 88 in 2012.[14][15][16] The rate of autism among adults aged 18 years and over in the United Kingdom is 1.1%.[17] The number of people diagnosed has been increasing dramatically since the 1980s, partly due to changes in diagnostic practice and government-subsidized financial incentives for named diagnoses;[16] the question of whether actual rates have increased is unresolved.[18]
https://en.m.wikipedia.org/wiki/Autism
https://en.m.wikipedia.org/wiki/Autism