major international event or on the IF's ranking list. There is a general rule that a maximum of three individual athletes may represent each nation per competition. National Olympic Committees (NOCs) may enter a limited number of qualified competitors in each event, and the NOC decides which qualified competitors to select as representatives in each event if more have attained the benchmark than can be entered. Nations most often qualify teams for team sports through continental qualifying tournaments, in which each continental association is given a certain number of spots in the Olympic tournament. Each nation may be represented by no more than one team per competition; a team consists of just two people in some sports. Popularity of Olympic sports The IOC divides Summer Olympic sports into five categories (A – E) based on popularity, gauged by six criteria: television viewing figures (40%), internet popularity (20%), public surveys (15%), ticket requests (10%), press coverage (10%), and number of national federations (5%). The category of a sport determines the share of Olympic revenue received by that sport's International Federation. Sports that were new to the 2016 Olympics (rugby and golf) have been placed in Category E. The current categories are: Aquatics encompasses artistic swimming, diving, swimming, and water polo. All-time medal table The table below uses official data provided by the IOC. Medal leaders by year Number of occurrences — 18 times — 6 times — once — once — once — once — once List of Summer Olympic Games The IOC has never decided which events of the early Games were "Olympic" and which were not. The founder of the modern Olympics, Pierre de Coubertin, ceded that determination to the organisers of those Games. A. The IOC site for the 1896, 1900 and 1904 Summer Olympic Games does not include Mixed teams (teams of athletes from different nations) as separate "nation" when counting participating nations. At the same time the IOC shows Mixed team in the results of competitions where these teams competed. Thus, specified number of national teams plus Mixed teams participated in the Games. B. At an earlier time the IOC database for the 1900 Summer Olympics listed 85 medal events, 24 participating countries and 997 athletes (22 women, 975 men). The Olympic historian and author, Bill Mallon, whose studies have shed light on the topic, suggested the number 95 events satisfying all four retrospective selection criteria