The dey was in effect a constitutional autocrat. The dey was elected for a life term, but in the 159 years (1671–1830) that the system was in place, fourteen of the twenty-nine deys were assassinated. Despite usurpation, military coups and occasional mob rule, the day-to-day operation of the Deylikal government was remarkably orderly. Although the regency patronised the tribal chieftains, it never had the unanimous allegiance of the countryside, where heavy taxation frequently provoked unrest. Autonomous tribal states were tolerated, and the regency's authority was seldom applied in the Kabylia, although in 1730 the Regency was able to take control over the Kingdom of Kuku in western Kabylia. Many cities in the northern parts of the Algerian desert paid taxes to Algiers or one of its Beys, although they otherwise retained complete autonomy from central control, while the deeper parts of the Sahara were completely independent from Algiers.