It does not report the % of employees covered by collective bargaining.

pg. 58

"Practices Related to Freedom of Association and Collective Bargaining

We respect freedom of association and our employees’ right to join, form, or not to join a labor union or other lawful organization of their own selection, without fear of reprisal, intimidation, or harassment."

"We value worker feedback, and are committed to providing our employees with grievance mechanisms and remedial action, regardless of collective bargaining presence."