I'm sure if I dug around enough I could find enrollment rates by area of study. The data I've seen only specifies level of education. Even at non-HS or HS graduate levels, minority unemployment is significantly higher. I would be surprised if minorities were so severely overrepresented in 'less demand' fields of higher education that it resulted in 100% increase in unemployment, though.
BTW, Y2HH is the WORST poster on the internets.