This excerpt taken from the SO 10-K filed Feb 27, 2007.
Employee Savings Plan
The Company also sponsors a 401(k) defined contribution plan covering substantially all employees. The Company provides an 85 percent matching contribution up to 6 percent of an employees base salary. Prior to November 2006, the Company matched employee contributions at a rate of 75 percent up to six percent of the employees base salary. Total matching contributions made to the plan for 2006, 2005, and 2004 were $3.0 million, $2.9 million, and $2.8 million, respectively.