Every 2 years the R&A publishes a study regarding the number of courses around the world. Google "R&A Golf Around the World 2021" for the latest edition...it gives the number of facilities, number of courses, and number of golf holes by country (I presume that Winged Foot would be considered a single facility with 2 courses containing 36 holes...and that Bandon Dunes would be considered one facility with 6 courses (Bandon Dunes, Bandon Trails, Pacific Dunes, Old Mac, Sheep Ranch, and Bandon Preserve) with 103 holes (5x18 plus 13 holes on Preserve). But there is very little detail...and I called the R&A a few years ago to see if I could get a copy of their data base and was politely told NO.