Washington: Teen birth rate Note: The teen birth rate is calculated by dividing the number of births to females age 15-17 by the number of females age 15-17. The rate is presented on a "per 1,000" basis. NA = Not Reported or Not Available. Source: 1998-2018: Idaho Department of Health and Welfare (https://publicdocuments.dhw.idaho.gov/WebLink/Browse.aspx?id=11614&dbid=0&repo=PUBLIC-DOCUMENTS); 1998-2018: National Center for Health Statistics, Birth Data (https://www.cdc.gov/nchs/births.htm); Note: Data for number of females aged 15-17 come from the Census Bureau's intercensal estimates and the decennial census when not available from state agencies, with the exception of 2001 data, which come from the National Center for Health Statistics' National Vital Statistics System (http://www.cdc.gov/nchs/nvss/.); DATE LAST UPDATED: December 3, 2020.