Risk in parachuting is best expressed as Injuries per 1000 Jumps and as Fatalities per 100,000 Jumps. 'Injury' may mean anything from a minor cut, bruise or scratch through fractures and sprains to multiple fractures and internal injuries. If a parachutist reports any injury, it is counted. Fortunately most of the injuries are minor or are simple fractures. Multiple or internal injuries are rare. The injury rates quoted are fairly stable and are useful for comparing one type of parachuting with another. Fatality rates are less stable from year to year due to the (thankfully) tiny numbers involved - it is debatable whether they are stable enough for comparing one type of parachuting with another.
