If Leicester wins the league with their current point-per-game ratio, it'll be the third lowest in PL history.
Chelsea 04/05 - 95 points (2,50)
Manchester United 99/00 - 91 points (2,39)
Chelsea 05/06 - 91 points (2,39)
Arsenal 03/04 - 90 points (2,36)
Manchester United 08/09 - 90 points (2,36)
Manchester United 06/07 - 89 points (2,34)
Manchester City 11/12 - 89 points (2,34)
Manchester United 12/13 - 89 points (2,34)
Arsenal 01/02 - 87 points (2,28)
Manchester United 07/08 - 87 points (2,28)
Chelsea 14/15 - 87 points (2,28)
Chelsea 09/10 - 86 points (2,26)
Manchester City 13/14 - 86 points (2,26)
Manchester United 93/94* - 92 points (2,19)
Manchester United 02/03 - 83 points (2,18)
Manchester United 95/96 - 82 points (2,15)
Blackburn 94/95* - 89 points (2,11)
Manchester United 00/01 - 80 points (2,10)
Manchester United 10/11 - 80 points (2,10)
Manchester United 98/99 - 79 points (2,07)
Arsenal 97/98 - 78 points (2,05)
Leicester 15/16 - 57 points after 28 games (2,03)
Manchester United 92/93* - 84 points (2,00)
Manchester United 96/97 - 75 points (1,97)
*Played 42 games in those seasons
The league table in the 96/97 season btw.: