Longitudinal data on HS graduation & dropout rates

Nevada still tops the list--of lowest graduation rates (51.3%). Wisconsin must be doing something right since they graduate 89.6% of their students. Data from NCES covers the period 1978-2008 and is also broken down by race/ethnicity, sex and age. Overall, "approximately 3 million 16- through 24-year-olds were not enrolled in high school and had not earned a high school diploma or alternative credential as of October 2008, [representing] 8 percent of the 38 million non-institutionalized, civilian individuals in this age group living in the United States..." Highest dropout rates continue to be among Hispanic Americans while Asian Americans and students of more than one race have the lowest rates. Full report is here:
http://nces.ed.gov/pubsearch/pubsinfo.asp?pubid=2011012