This visualization shows the sharp decline in the Hawaiian native population from the estimate of 300,000 in 1778. However, this estimate is suspected to be low. The definition of Hawaiian in this data is that the person is Full-blooded Hawaiian while Part-Hawaiian is only part Hawaiian. The US Census includes the total population counted, which stop counting full Hawaiians in 1970.
A History of Hawaii By Linda Menton, Eileen Tamura