(Actually I stuck 2 more notable titles down the bottom for comparison)
  
|     202  |   |
|     97  |   |
|     warhammer online  |        86  |   
|     72  |   |
|     72  |   |
|     Team Fortress 2  |        70  |   
|     63  |   |
|     Civilization 4: Beyond the Sword  |        58  |   
|     57  |   |
|     47  |   |
|     Spore  |        41  |   
|     41  |   |
|     41  |   |
|     40  |   |
|     35  |   |
|     Colonization  |        35  |   
|     UnAngband  |        34  |   
|     FuryBand  |        34  |   
|     33  |   |
|     Battle of Tiles  |        32  |   
|     31  |   |
|     31  |   |
|     23  |   |
|     22  |   |
|     21  |   |
|     20  |   |
|     World of Goo  |        18  |   
|     17  |   |
|     Kongregate  |        17  |   
|     Mythos  |        16  |   
|     9  |   |
|     4  |   
Gratz to Football Manager for soaking up an extroardinary amount of time. I'm a bit surprised it's not bigger than 200 hours as my save game has over 20 days played (~500 hours). 
I'm amazed that Crusader Kings turned up so highly. It was an awesome game and I'd pulled it out again recently when talking about AARs. I think AARs are one of the keys to a long time in the game. Both CK and FM08 were the target of AARs, although Fallout 3 didn't get much higher from its logs. I did put nearly 60 hours in one week playing CK though, that was a record right there.  
A few anomalies in the list:
TrackMania comes in second if you count both TMNF and TMN as the same game (which I would). It never was a priority during the year, but kept being played 2-3 hours a week. 
Guitar Hero III and World Tour combined makes it come in at 3rd. Another one that kept ticking over through the weeks. 
World of Warcraft managed only ~50 hours combined. I used to do that in a week back in the beginning.