Professional golf tours are the means by which otherwise unconnected professional golf tournaments are organised into a regular schedule. There are separate tours for men and women; most are based in a specific geographical region, although some tours may hold tournaments in other parts of the world. At least 95% of professional golfers make their primary income as club or teaching professionals rather than from competition. A small elite in the profession who obtain income from prize money and endorsements are called "touring professionals", "tournament golfers", or "pro golfers". The best golfers can make up to 8-figure incomes in U.S. dollars from tournament play. Including endorsement income, pro golfer Tiger Woods was the highest earning sportsman for much of the first decade of the 21st century, according to Forbes magazine. But making a living from tournament golf can be difficult. Tournaments have entry fees and the associated costs of travel and lodging, plus the hire of a caddie. Moreover, most tournaments have a "cut" after the second of four rounds, meaning that only the top half or so continue play. Only those who make the cut receive any prize money, and only the top players take home significant winnings. History The golf tour system evolved more by trial and error than by design. In the early days of professional golf, in each region of the world each professional tournament was established by a separate golf club, golf organisation or commercial sponsor. As the number of tournaments increased, the most talented professional golfers concentrated mainly on playing in tournaments rather than on club professional and golf instruction work. Once a good number of tournaments were being played in a region each year, they were formalised into a "tour", which was supervised by a single organisation, although many tournaments continue to be run by separate bodies. The PGA Tour was the pioneer of the tour system, and its establishment date is not very clearly defined. The PGA of America was established in 1916. Lists of players with the most wins in each season are available from that year, and career win totals are based on results from 1916 onwards. However, the idea of a "tour" had not firmly crystallised at that time and several important developments came much later. Bob Harlow was named manager of the PGA Tournament Bureau in 1930, the first "playing pros" organisation was formed in 1932, and money