How much time do you actually spend working at your job? POLL

[otnemem]

It's a simple question. I used to work in books, then magazines, now advertising. There are times when I'm really busy and I actually devote 80%+ of my time to work while I'm actually at my job. But the rest of the time - the downtime - I would calculate my average somewhere around 40%. This last week I would say I've worked roughly 8% of the time I've been at my desk. I want to know whether this is normal or not.

I guess responses will vary heavily depending on what industry you work in, but that's what replies are for.