In 2004, the Idaho birth certificate was revised for the question on mother's education. Prior to 2004, the question on based on the number of years of school completed; beginning in 2004, education is based on the highest degree or level of school education was completed at time of delivery.
There have been substantial changes made to the 2008 American Community Survey (ACS) questions on labor force participation and number of weeks worked. After thoroughly investigating the extent to which each of the Kids Count indicators of economic well-being may be affected, we believe that the changes in methodology were significant enough to constitute a break in the trend. We therefore do not recommend that you make comparisons to previous years’ estimates.
For more detailed information about the changes made and tables comparing 2007 and 2008 state-level estimates of employment and unemployment read The Census Bureau notes at: http://www.census.gov/hhes/www/laborfor/researchnote092209.html.
In 2004, the Idaho birth certificate was revised for the question on prenatal care. Prior to 2004, the question on prenatal care was based on the month prenatal care began; beginning in 2004, Idaho prenatal care data are based on date of first prenatal care visit. There is a break in the Idaho trend line between 2003 and 2004.
Not all states have revised their birth certificate to the 2003 US Standard Certificate. Prenatal care data based on the 2003 revision of the US Certificate are not comparable with data based on the 1989 US Certificate.