Give rate of prevalence of dental caries in children?

Research indicates that the prevalence rate of caries increases steadily across the human life span. The frequency of caries in children is 18% in children aged 2 to 4 years, 52% in children aged 6 to 8 years
67% in children aged 12 to 17 years, Prevalence rates vary by ethnicity as well as socioeconomic status. African American and Hispanic children have higher rates of caries at all ages, compared with white non-Hispanic children. Data indicate that American Indian/Alaska Native children have among the highest rates of caries.There is inadequate data on children with special health care needs, but as a group they are at increased risk for coexisting morbidities such as caries.There is inadequate data on children with special health care needs, but as a group they are at increased risk for coexisting morbidities such as caries.