Answer:
This estimate is a 15% increase from the 1 in 68 rate in 2010, 86% increase from the 1 in 110 rate in 2006 and 154% increase from the 1 in 150 rate in 2000. Diagnostic criteria of ASD has changed significantly since the 1980s; for example, U.S. special-education autism classification was introduced in 1994.