The Lakers hold several NBA records as a team including most consecutive games won overall (33) and most consecutive road games won (16) both of which came during the 1971-72 season. Highest field-goal percentage for a season at 54.5% (1984-85), and highest road winning percentage at 0.816 (1971-72). They also hold records for having (into the 2009-10 NBA season) the most wins (3,027), the highest winning percentage (61.9%), and the most NBA Finals appearances (31). The 2000-01 team set the NBA record for best playoff record at 15-1, which was later broken by the Golden State Warriors in 2017. The 1971-72 team holds franchise records in wins (69), most points scored, and largest margin of victory; both of the latter came in the teams 63 point win versus Golden State (162-99). They also used to hold the record for most wins at home in the regular season (going 36-5 in 1971-72, then 37-4 in both 1976-77 and 1979-80) before the Boston Celtics set the current record of 40-1 in the 1985-86 season.
Question: How many years after the last time the Lakers set the record for most wins at home in a regular season did the Boston Celtics set the current record?
Answer: 5