What's happening with extreme sports?

Here's how the popularity of five extreme sports sometimes found in location-based entertainment and recreation facilities has changed between 2001 and 2004, based upon the number of participating Americans aged 6 and older.

  Change
Inline skating -33.3%
Skateboarding -7.0%
Artificial wall-climbing +3.8%
Paintball +25.6%
Roller hockey -34.6%