I have no idea, but it's far more than I'd say even if I knew. Since Skyrim is the only game I'll be playing for quite a while, I think my total projected time is somewhere near 2-5 thousand hours after several years. Of course, gaming is part of what I do, and in some cases it's essential to my work (that and media in general - I love my job). Not only am I playing the game, I'm studying things like: lighting, sound effects, camera placement, shot placement, etc. Skyrim is unique in more ways than I can count, you don't even realize it when playing, but in nearly ever direction you look in the game, the shot is perfect. Shot placement is where objects in the camera's veiw are lined up properly on a grid, usually with nearby objects, middle objects, and distant objects (note: distant is unnecessary unless you're doing a scenic shot. Oh, and let's just say Mark Lampert is a freakin' genius, not the best, but he knows what he's doing and works with what he's given quite nicely; I look forward to hearing more of his art.
[edit: still looking for the dryer sound, if anyone knows where it is, please tell me, but I'm sure I'll find it eventually]
Okay, and I just put everyone to sleep with my boring rant...I like to keep my audience riveted!