U.S. CDC; E. Otwell
The number of 8-year-olds with an autism spectrum disorder rose from 1 in 88 (or 11.3 per 1,000) in 2008 to 1 in 68 (14.7 per 1,000) in 2010, the U.S. Centers for Disease Control and Prevention estimates. An uptick in diagnoses, perhaps due to better detection, may explain the increase and the regional differences seen. Alabama’s autism rate is just 5.7 per 1,000, while New Jersey’s is 22 per 1,000.
J. Baio et al. Prevalence of Autism Spectrum Disorder Among Children Aged 8 Years — Autism and Developmental Disabilities Monitoring Network, 11 Sites, United States, 2010. Morbidity and Mortality Weekly Report. Vol. 63, March 28, 2014, p. 1.
L. Sanders. Autism spike may reflect better diagnoses, and that's a good thing. Growth Curve blog, Science News. March 28, 2014.