(CNN)One in eight children and young people between the ages of five and 19 in England has a mental disorder, according to a new report.
The report, "Mental Health of Children and Young People in England, 2017," published Thursday by the UK's National Health Service, gives the first official figures since 2004 exploring mental health problems among the young. Its findings are based on a survey of more than 9,000 young people.
One in six (16.9%) 17- to 19-year-olds was found to have a mental disorder and the group most at risk of mental illness was young women, with nearly one in four of 17- to 19-year-old girls struggling with mental health problems.
Mental disorders were grouped into four categories: emotional, behavioral, hyperactivity and other less common disorders.
Mental health problems are less common in younger age groups but numbers are slowly rising, according to the report. The five- to 15-year-old age group saw a 1.1-percentage-point rise in overall prevalence of mental disorders, from 10.1% in 2004 to 11.2% in 2017, with emotional disorders more common in this age group -- increasing to 5.8% in 2017 from 3.9% in 2004.
"These new figures reveal just how many of our young people are affected by mental health conditions. They make for sobering reading, confirming what psychologists who work with this group have known for years -- that the mental health