Yeah, but those censuses were made when the sugar industry was the mainstay here (XVIth century). After the Brazilian competition displaced this colony, and Havana was made the main Caribbean Spanish port, everything changed. The sugar economy would collapse and the massive importations of African slaves wouldn't reappear on the island until the French changed the economy of their own part of the island from a tobacco cultivating one to a sugar plantation one following the Jamaican model (1697). Plus, most of the slaves from that first sugar period would die from the smallpox and measles epidemics that happened here during the XVIIth century, which would be called the "century of misery" by the chroniclers, and part of their labor in the countryside would get to be replaced by Canarian inmigrants (from 1680-1795), as well as contraband importations of African labor from the French colony and Curacao. Heck, Gurabo's family itself would come to this island as part of the Canarian wave.
NS, I agree with most of what you said , except that smallpox epidemics during that ingenio period also killed many native Indians ( as reported by Juan Bosch in Composion Social Dominicana) because they were also slaves in these ingenios , yet native indian ancestry is still to be found in the DR and is still surpassed by african ancestry.
The latter censuses in the 19 th century of santo domingo documented by Carlos Larrazabal Blanco ("Los Negros y la esclavitud en Santo Domingo") or Jos? Antonio Saco ("La supresion del tr?fico de esclavos africanos en la isla de Cuba") consolidates one fact : The mulatto and/or black element always surparssed the European element in the DR from colonial times to nowadays.
I see two periods
(1) The African element surpassed both Spanish ( and others) and Native Indians , rougly from the beginning of the 16 th until the beginning 17 th century : mainly due to the ingenios and during this period La Hispaniola was a maroon colony ( Sebastian Lemba and others)
(2) The Mulatto element surpassed the pure black element ( ? la Haiti) mostly when the slave owners were broke and had to mingled with their slaves roughly from 17th to nowadays ( starting from Osario period) : mainly because most the spanish had left La Hispaniola for the main continent ( more gold and wealth) and la Hispaniola already drained from his wealth was abandoned by Spain
However my statement remains the same, if the DR nation remains a mulatto nation today in 2013 it's because that one time of history this country looked like Haiti ( more especially during that Ingenio's period that is true)
As example , during antiquity North Africa was a black area ( cf : Tassily Frescoes) , Romans calling the inhabitants Maurus , Greeks Mauros. Mauritania and Morocco named after that population. Heck with the time , invasions , migrations ( native spanish who became muslims) , slavery ( see Robert Davis " Christian Slaves, Muslim Masters") etc. North African do not represent anymore the people represented on the Tassili.