I'm not sure when this study was completed by man-o-man is it good/funny/scary/interesting. According to the intro of the study:
This study was commissioned as part of the book, Stop Tweeting Boring Sh*t – The New Rules of Work, published by Chronicle Books. While the book is written as a humorous guide to the modern workplace, the study takes an actual look into the behavior of today’s office workers. 850 office workers around the country were surveyed as part of the study. They were asked a series of questions about their behavior, beliefs and life at work.
The results paint a very interesting picture of the way people spend nearly a third of their lives.
Here's a couple more shots from the report - but it's free so go download it yourself.