"CDC estimates that about 1 in 44 8-year-old children have been identified with ASD (or 23.0 per 1,000 8-year-olds). These estimates from the ADDM Network are based on data collected from health and special education records of children living in 11 communities across the United States during 2018."
1 in 44 people have autism as of 2018, autism is life-long
Confusion of Autism meltdowns and Autism shutdowns with Bipolar disorder:
"Bipolar disorder is fairly common and one in every 100 adults will be diagnosed with the condition at some point in their life. Bipolar disorder can occur at any age, although it often develops between the ages of 15 and 19 and rarely develops after 40."