Ketamine use hit a record among 16 to 24-year-olds last year with almost one in 25 people in this group in England, official figures show. This is a jump of a fifth on 2020’s figure. Ketamine use hit a record among 16 to 24-year-olds last year with almost one in 25 people in this group in England, official figures show. This is a jump of a fifth on 2020’s figure.