One-third of all delinquency cases disposed in 2007 received probation as the most serious disposition Courts with juvenile jurisdiction handled 1.7 million delinquency cases in 2007. Probation supervision was the most severe disposition in 34% (561,600) of all delinquency cases. The number of cases placed on probation grew 34% between 1985 and 2007. During that time, the overall delinquency caseload increased 44%. These findings are based on national data on delinquency cases that juvenile courts processed from 1985 through 2007. The national estimates were generated using information contributed to the National Juvenile Court Data Archive. The analysis is based on data from more than 2,200 jurisdictions containing 81% of the U.S. juvenile population (youth age 10 through the upper age of original juvenile court jurisdiction in each state).