In the Australian case, that percentage is heavily skewed by bulk freight of coal, iron ore, wheat, etc. That's often using dedicated tracks, direct from mines to ports, and not connected to the general freight network.
The mix of road and rail for more general freight has been heavily in favour of road for a long time, and only getting worse as Internet shopping, etc, increases the role of last-mile home delivery.
The mix of road and rail for more general freight has been heavily in favour of road for a long time, and only getting worse as Internet shopping, etc, increases the role of last-mile home delivery.