Folks should also realize that the clutch % worn figure can be fudged by re-baselining new clutch closed position - NCCP - (by an unscrupulous person...). So, be skeptical of the values you see from the interrogating devices. In reality the way to determine (or rather, get a sense- in any case) for the state of the clutch - is to note the conditions under which the car has been driven (city, motorway, suburban), note miles since a new clutch, note whether the driver has allowed engine rpm to be <1800 rpm much of the time, how aggressively the starts have been, etc... These are somewhat subjective. If you have had the car since new or since a clutch change, then figure on 700 km per 1% of clutch wear... 70,000 km (43,000 miles) per clutch... under varied circumstances of driving. It can be a lot less than 70,000 km of life under heavily urban driving circumstances... and the converse...
Remember, also, peripheral cpt failure also can cause the need for a clutch job... No way you are going to all the trouble of getting to those cpts and NOT renewing the clutch when there!