Bikejournal says:

78 rides this year.
Avg speed 24.5 kmh (15.2 mph)
Not very accurate because of the variety of rides types.

However, here are my rough stats according to type:

Hilly rides: avg speed about 25-26 kmh (15-16 mph)
Flat rides: avg speed about 29-30 kmh (18-18.5 mph)

Best time:
Triathlon:
20k in 38:18
31.5 kph (19.6 mph) (had 900' climbing including two 9% hills.)