The House of Bourbon replaced the House of Habsburg in Spain in 1700, and introduced economic reforms that gradually began to revive trade in Santo Domingo. The crown progressively relaxed the rigid controls and restrictions on commerce between Spain and the colonies and among the colonies. The last "flotas" sailed in 1737; the monopoly port system was abolished shortly thereafter. By the middle of the century, the population was bolstered by the emigration of Spaniards from the Canary Islands, resettling the northern part of the colony and planting tobacco in the Cibao Valley, and importation of slaves was renewed. The colony of Santo Domingo saw a population increase during the 18th century, as it rose to about 91,272 in 1750. Of this number, approximately 38,272 were white landowners, 38,000 were free mixed people of color, and some 15,000 were slaves. This contrasted sharply with the population of the French colony of Saint-Domingue (present-day Haiti) – the wealthiest colony in the Caribbean and whose population of one-half a million was 90% enslaved and overall, seven times as numerous as the Spanish colony of Santo Domingo. The 'Spanish' settlers, whose blood by now was mixed with that of Taínos, Africans, and Canary Guanches, proclaimed: 'It does not matter if the French are richer than us, we are still the true inheritors of this island. In our veins runs the blood of the heroic "conquistadores" who won this island of ours with sword and blood.'