SAN JOSE, Calif. (AP) — Google has had more trouble diversifying its workforce than its computer scientists have had writing programs that respond to search requests in the blink of an eye or designing cars that can navigate traffic without a human behind the wheel.

That seemed to be the conclusion when the Silicon Valley giant this week issued a gender and ethnic breakdown of its workforce that showed that of its 26,600 U.S. employees, 61 percent are white, 30 percent Asian, 3 percent Hispanic and 2 percent black. Thirty percent of its employees are women.