Thank you, Madam Chair.
Thank you to both of you for being here today.
I have a number of questions related to a few different pages of your presentation, Mr. Mueller, so I'll try to sort of hop around on them.
On pages 8 and 9, you refer to some of the cost benefits that are a result of certification. I'm just wondering how you measure those. You mentioned especially productivity and health benefits. Do you measure that by the number of sick days? Do you measure it by the fact that your employees now take two steps at a time up the stairs? How do you measure that productivity?