81% of pole positions in two consecutive seasons: Ayrton Senna - 1988/1989, 26 poles in 32 races (13 poles each season)
81% of pole positions in one season: Alain Prost in 1993 with 13 poles in 16 races
81: the number of points it was possible for one person to score when Juan Manuel Fangio won the championship with a bizarrely calculated 54.14 points. Points were awarded thus: 8 for the win, 6 for 2nd, 4 for 3rd, 3 for 4th and 2 for 5th. 1 point was awarded for the fastest lap. However, in '54 drivers were allowed to share drives so points were divided between the drivers sharing a drive and there it got complicated ...