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 emigration 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 population of Santo Domingo grew from about 6,000 in 1737 to approximately 125,000 in 1790. Of this number, about 40,000 were white landowners, about 25,000 were mulatto freedmen, and some 60,000 were slaves. However, it remained poor and neglected, particularly in contrast with its western, French neighbor Saint-Domingue, which became the wealthiest colony in the New World and had half a million inhabitants. The 'Spanish' settlers, whose blood by now was mixed with that of Tainos, Africans and Canary Guanches, said to themselves: "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."