How many points Sheffield United need to win automatic promotion to the Premier League

Sheffield United fans are dreaming of the Premier League after beating fierce rivals Leeds United, but how many more points do they need?
Sheffield United after beating LeedsSheffield United after beating Leeds
Sheffield United after beating Leeds

The average amount of points needed for gaining automatic promotion is 87.1, an average of 1.89 points per game. United are currently averaging 1.94, but how many points were needed to get automatic promotion since the introduction of the Premier League?