Table 1.

Identified prevalence of autism spectrum disorder (Autism and Developmental Disabilities Monitoring [ADDM] criteria)

Surveillance year	Combined prevalence per 1000 children (range across ADDM sites)	Absolute risk (e.g., 1 in X children)
2000	6.7 (4.5–9.9)	1 in 150
2004	8.0 (4.6–9.8)	1 in 125
2008	11.3 (4.8–21.2)	1 in 88
2012	14.5 (8.2–24.6)	1 in 69
2016	18.5 (18.0–19.1)	1 in 54