Thanks to Raz­ib, I’ve man­aged to sep­a­rate out His­pan­ic grad­u­a­tion rates in our new favorite graph (cf. and also):

I did­n’t put this on the graph, but immi­gra­tion his­to­ry does make a dif­fer­ence here. His­pan­ics born in the US have essen­tial­ly the same high school grad­u­a­tion rate as every­one else, go to col­lege more often than those born else­where (some­what high­er than among African Amer­i­cans), and have com­pa­ra­ble rates of attend­ing grad schools as for­eign-born His­pan­ics, both slight­ly low­er than African Americans.

And thanks to oth­er sug­ges­tions in the com­ments, here’re the same data aggre­gat­ed into three-year chunks, which wash­es out some of the year-to-year variation:

The decrease in num­ber of peo­ple get­ting grad­u­ate degrees does not seem to be a reflec­tion of grow­ing minor­i­ty pop­u­la­tions, as those groups had high­er rates of grad­u­ate edu­ca­tion in the same gen­er­a­tion which begins the soci­etal drop in rates of attend­ing grad­u­ate school.

I still don’t know what it means, but num­bers are fun.