Final answer:
Child abuse is a known contributor to delinquency, but the specific percentage of delinquents who were abused as children is not mentioned.
Step-by-step explanation:
The percentage of delinquents who were abused as children according to the CDC is not specified in the given information. However, it is important to note that child abuse is a known contributor to delinquency. Factors such as drug and alcohol use, social isolation, depression, low parental education, and a history of being mistreated as a child can increase the risk of delinquency in abused children.