The World Cup scoring system is based on awarding a number of points for each place in a race, but the procedure for doing so and the often-arcane method used to calculate the annual champions has varied greatly over the years. Originally, points were awarded only to the top 10 finishers in each race, with 25 points for the winner, 20 for second, 15 for third, 11 for fourth, 8 for fifth, 6 for sixth, 4 for seventh, and then decreasing by 1 point for each lower place. To determine the winner for each discipline World Cup, only a racer's best 3 results would count, even though there would typically be 6–8 races in each discipline. For the overall Cup, the best three results in each discipline would be summed. Until 1970, also the results of Winter Olympic Games races and Alpine World Ski Championship races were included in the World Cup valuation (i.e. Grenoble 1968 and Val Gardena 1970); this was abandoned after 1970, mainly due to the limited number of racers per nation who are admitted to take part in these events. For the 1971–72 season, the number of results counted was increased to 5 in each discipline. The formula used to determine the overall winner varied almost every year over the next decade, with some seasons divided into two portions with a fixed number of results in each period counting towards the overall, while in other seasons the best 3 or 4 results in each discipline would count.