The 10% figure is taken from a limited, anecdotal dataset if I read the article right.
The actual numbers over time are about 46/49% cyclist/motorist at fault, with 5% uncertain or shared. The motorists have a slight edge on the cyclists for fault, but not by very much.
The most common cyclist behaviors that result in a car-bike crash are:
1. Riding on the wrong side of the road, against traffic;
2. Trying to make a left turn from the right edge of the roadway (which results in a hit-from-behind crash);
3. Riding out from a driveway without yielding;
4. Running a stop sign or stop light.
For motorists, the mostcommon causes are:
1. Left cross (turning left without yielding to an oncoming cyclist);
2. Right hook (turning right in front of a cyclist)
3. Running a stop sign or stop light;
4. Dooring
5. Driving out from a driveway without yielding to a cyclist in the traffic lane.
These are some fairly long-running numbers, and are skewed a bit in that they also include children's crashes. Hit-from-behind crashes do seem to be on the upswing, not only from driver inattention, but also more cyclists being out on the road and not using lights or reflective gear.