San Diego County’s unemployment rate dipped to 6.4 percent in December, down from a revised 6.9 percent in November, and down from the year ago rate of 8.2 percent. But the decline was more a result of fewer people enrolled as unemployed, according to the latest report from the state’s employment department.

The number of registered unemployed persons in the county was nearly 102,000, down by about 8,400 from November, and down nearly 29,000 from December 2012, the report stated.

Over the past month, the San Diego area gained a net of 600 jobs, increasing the nonfarm employment total to about 1.3 million.

Over the full year, the region showed a net gain of 23,200 jobs, up 1.8 percent from December 2012. The sector contributing the most to the gains was educational and health services, up 6,200 jobs. It was followed by construction, up 5,700 jobs; leisure and hospitality, up 5,600 jobs; and the jobs sector that includes retail trade, up 5,300 jobs.

The seasonally adjusted jobless rate for California dropped to 8.3 percent, down from 8.5 percent in November. The national jobless rate fell to 6.7 percent, down from 7 percent in November.