In table T.4 on page 71, as seen in the Annual Report of 2018, you can find the revised average percentage of workers covered under the collective bargaining agreement for this year.

However, this value differs from what has been mentioned on page 82 of the Annual Report of 2016, which states that - "and the employment of over 30 percent of our employees was covered by a collective bargaining agreement..."

In table T.4 on page 53, as seen in the Annual Report of 2016, you can also find the breakdown by region of workers covered under the collective bargaining agreement.