Does it count time sitting at the main menu? I didn't think so. But I spend most of my spare time playing this game. I get 7hr of sleep per night and work 8-9hrs per day. I take several vacations per year with the PC off. I'll take a snapshot of time played screen if it looks too incredible to be believed27w 6d 11h = 4691 hours.
1 year 45 days = 9840 hours.
So just under half the time was spent with the game running. Presumably at least some of that was AFK. While an interesting stat I'm not sure anything can really be read into it beyond praise for such a stable game
4691 / 410 = 11hrs per day. That is definitely not correct. At most I play 6hrs per day. I come home for lunch and leave it logged in at the main screen for the rest of the day. Logout at midnight. So unless this is counting time at the main menu I don't know what is going on.