32% of Detroit Public School Students Graduate High School

Bloomberg reports:

Detroit public schools ranked last among 17 big U.S. cities in science, reading and math scores of students participating in national assessment tests, administered in early 2009. Detroit public schools graduate 32 percent of their students, according to a study by Michigan State University, compared with a national average of 72 percent.

Why should taxpayers subsidize this sort of failure. Could private education really do any worse than this???