According to a study of Western-built commercial jets involved in crashes during ten years, the percent of airplane crashes that occur at each stage of flight are as follows:

Phase	Percent
On ground, taxiing	5
During takeoff	9
Climbing to cruise altitude	20
En route	4
Descent and approach	31
Landing	31

If one of the doomed flights during ten years is picked at random, what is the probability that it crashed while taxiing on the ground or while en route?