Teenage children have been identified as being at increased risk of dental disease, and among pre-teen children nearly half of all 6 year olds had a history of decay in their baby teeth. The Child Dental Health Survey provides national information on the dental health of children attending school dental services in Australia, and shows decay experience is relatively common in both teenage and pre-teen Australian children.

You can download the reports from http://www.aihw.gov.au/publications/index.cfm/title/10778.