Thought to be between around 11% in males and 6% in females of all hernia surgery in the United States. (1) I have seen lower figures but this is a large study.
Source: Murphy Bl. Ubl DS Zhang J, Habermann EB,Farley Dr, Paley K. 'Trends of inguinal hernia repairs performed for recurrence in the United States'. Surgery. 2017 Sept 15 Epub