Well, lets see. In 1981-82, there were 6493 goals scored by 21 teams playing 80 games each, for a total of 840 games. In 2009-10, there were 6389 goals scored by 30 teams playing 82 games each, for a total of 1230 games.
So, goals per game in 81-82 = 7.7
Goals per game in 09-10 = 5.2
If we...