What's the percentage of full-blooded Native Hawaiians left on Hawaii?

Okay first off I'm not Hawaiian but I do take an interest in human geography/humanties whatever you like to call it, so I find this sort of stuff interesting. Anyway as many of you know the Native Hawaiian people became a minority in their own land when an influx of people from Asia and the US emigrated to the island. From this intermarriage was to take place. Anyway my question is how many full-blooded Native Hawaiians are left? I'm sure many people will say that a large percentage will be found on the island of Niihau, but how about the state as a whole?