During David Dacko's presidency from 1960 to 1966, there was a significant increase in the production of diamonds. This occurred when the monopoly of the French concessionary companies was ended with a law allowing local citizens to dig for diamonds. After Dacko set up a diamond cutting factory at Bangui, diamonds became the country's leading export. But by the end of his five-year tenure, rampant corruption and financial indiscipline had resulted in workers being left unpaid and civil unrest ensued. Bokassa then seized power in a military coup in 1966.