21st Century Centennial Insurance Co. has cut its car insurance rates for new customers in Illinois by an average of 9.5 percent. New customers can expect to save nearly $150 a year, the company said in a statement.

Actual premiums will vary by customer depending on a variety of factors.

Insuring more than 2 million vehicles in 49 states and Washington, D.C., 21st Century is part of the Farmers Insurance Group.