The Official Worl Golf Rankings is a system for rating the performance level of male professional golfers. They were introduced in 1986 and are endorsed by the four Major Championships and the six professional tours which make up the International Federation of PGA Tours, namely the PGA Tour, the European Tour, the Asian Tour, the PGA Tour of Australasia, the Japan Golf Tour, and the Sunshine Tour. Points are also awarded for high finishes on the Canadian Tour, Nationwide Tour and Challenge Tour.