My estimate is around 12,000 kilometers until this December. Home to work, 5 work days, makes for at least 100 km per week.

As of this month I could track days ridden, just in case. Especially since in snow I use studded tyre MTB (but we rarely have snow), and as of this spring I intend to use road bike more (since group rides start right after work, and going home would make me skip those rides). Going on a short holiday tommorrow, but so far it's been around 130 km this month.