The overall amount of goal scoring is also closely watched. In recent years, goal scoring has decreased. Many believe the game is less entertaining because of this, and blame the change on the increasing size of goaltending equipment and the advent of defensive systems such as the neutral zone trap. Fans of defensive hockey counter by saying the high scoring of the 1980s was an anomaly, and this shift represents a return to the norm. For the 2004-05 American Hockey League season, four major rule changes were made that were intended to increase the scoring in games and make it more popular among casual fans: