This 'number' kinda changes with location, temperature, climate, soils and type of maintenance procedures. So this is My UK 'take'. Southern turfgrass behaviour is entirely different.
In the UK a busy golf course does 35,000 - 40,000 rounds per year. Statistically an average member plays 35-40 times.
Very few golf courses do 50,000, the ones that do tend to be in poor condition. Bearing mind we play ALL YEAR ROUND IN THE UK so in the winter the amount of damage to a green is about twenty times the amount of a summer round.....so in principle conditions are generally poorer at courses that do a lot of winter traffic. The same applies around tees, bottle neck fairway areas. Many high profile courses that do a lot of traffic (especially going North) restrict play to mats for fairways. Quite a lot of courses play of mats for 6 months on their tees.
Golf green design in the UK takes far more account of traffic movements to and from the green largely because of our winter problems.
So in our situation the high number of rounds heal okay summertime, but wintertime can add significantly to higher the maintenance costs.
Size of greens and tees will also play in part in working out each individual capacity before conditions deteriorate.