Data represent the percentage of births in a given year to mothers without a high school degree (regardless of maternal age). Incidences greater than 0 and less than 5 are not reported and are indicated with a NA or X.
The number of births for which the educational status of the mother is unknown increased sharply between 2010 and 2011, although the number of births for which information is missing remains under 1% of all births. Prior to 2011, births to mothers without a high school degree is calculated as a share of total births; for the years 2011 and after, the indicator is calculated as a share of births for which the educational status of the mother is known.
Data from the Wisconsin Department of Health and Family Services, from the following sites: http://dhfs.wisconsin.gov/wish and http://www.dhs.wisconsin.gov/births/.