What's the life expectancy of a clutch drive belt?

[Peter W]

I have a 2012 TXT with the Kawasaki engine and Team clutches and what I believe to be the original drive belt (#618630). It works fine and pulls well in all conditions but the drive belt makes a rubber grunting noise against the clutch sheaves as the buggy slows down to a halt and the clutches return to their stationary position. I've had the drive belt off and there is no apparent structural damage, cracks or damaged 'teeth' on the belt. The clutch sheaves are shiny, smooth and dry.

I was wondering whether the time might be coming when I need to replace the drive belt. Unfortunately, the buggy doesn't have an hour meter so I don't know how many hours it's done. It was used as a golf club hire cart for 4 years before I bought it but I use it for just 1 or 2 rounds of golf per week nowadays.