Rates


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Rates

Rates were calculated using the Illinois population for each gender. Arrest and detention rates were calculated per 100,000 girls/boys ages 10 to 16. Under the Illinois criminal code, youth are adults at the age of 17 and youth that have reached their 17th birthday would be in the adult criminal justice system. Additionally, in Illinois, youth younger than age 10 cannot be detained in a juvenile detention facility and are rarely arrested, therefore detention and arrest rates are calculated with the population of youth ages 10 to 16. Corrections rates were calculated per 100,000 girls/boys age 13 to 16. In Illinois, youth may not be incarcerated in a juvenile correctional facility under the age of 13.

When numbers are particularly small, such as when calculating rates within an offense category, rates were calculated per 1,000 youth. Rates per 1,000 youth were also used to calculate a relative rate ratio discussed later in the report.


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