Drivers enrolled in the California Low Cost Automobile Insurance Program just saw their premiums get a little cheaper.

On May 15, the annual cost of premiums dropped by up to 9 percent across the state. In addition, income eligibility caps have been raised, meaning more people qualify for the program.

"More than 4 million cars, or 15 percent of the cars on California roads, don't have insurance," Dave Jones, California insurance commissioner, said in a press statement. "If financial limitations have kept consumers from purchasing car insurance, these changes make low-cost auto insurance a more viable option for uninsured drivers."

Since 1999, the Low Cost Automobile Insurance Program has provided liability-only coverage for less than $350 a year. The cost can be considerably less, depending on where the driver lives.

Drivers qualify if they:

• Have a good driving record.
• Are at least 19 years old.
• Have been licensed to drive for three years.
• Own a vehicle valued at $20,000 or less.
• Meet income eligibility requirements: $27,925 for one person, $37,825 for two people, up to $57,625 for a family of four.