OIA outdoor participation rates and Risk Activites: is there a correlation?

The U.S. based Outdoor Industry Association released its annual outdoor activity participation data for 2010. The OIA tracks participation trends and provides annual growth rates by activity and age group. As with any data such as this, I’m always curious how risk focused activities fair in relation to less risk oriented activities. Think mountaineering and whitewater versus trail running and bird watching. 
Demographers such as David Foote (Boom, Bust and Echo fame) have long argued that as a society ages, it becomes more risk averse. Logically, this should extend to its choices in recreational activities.
I re-crunched OIA’s numbers to come up with a five year average change in participation (as opposed to OIA’s one year data), and ordered them by amount of change, looking for a possible pattern with risk focused activities (RFA). Specifically, I was looking at whitewater kayaking, sea kayaking, rafting, climbing and scuba diving. These activities differ from the others in that confronting risk and risk assessment are both required and continual, beyond the inherent risks themselves.

Activity
2006; in 000's
2010; in 000's
5yr Average Change in Participation
Triathlon (Traditional/Road)
640
1978
209.06%
Kayaking (White Water)
828
1842
122.46%
RFA
Kayaking (Sea/Touring)
1136
2144
88.73%
RFA
Adventure Racing 
725
1339
84.69%
Boardsailing/Windsurfing 
938
1617
72.39%
Snowshoeing *4 yr avg
2400
3823
59.29%
Kayaking (Recreational)
4134
6465
56.39%
Bicycling (BMX) 
1655
2369
43.14%
Climbing (Traditional/Ice/Mtnring)
1586
2198
38.59%
RFA
Skiing (Freestyle) *4 yr avg
2817
3647
29.46%
Skiing (Cross-Country) *4 yr avg
3530
4530
28.33%
Running/Jogging
38559
49408
28.14%
Rafting
3609
4460
23.58%
RFA
Birdwatching More Than 1/4 Mile From Home/Vehicle
11070
13339
20.50%
Snowboarding *4 yr avg
6841
8196
19.81%
Backpacking Overnight
7067
8349
18.14%
Canoeing 
9154
10553
15.28%
Trail Running
4558
5136
12.68%
Skiing (Alpine/Downhill) *4 yr avg
10362
11504
11.02%
Hiking (Day)
29863
32496
8.82%
Scuba Diving
2965
3153
6.34%
RFA
Bicycling (Mountain)
6751
7161
6.07%
Bicycling (Road/Paved)
38457
39320
2.24%
Climbing (Sport/Indoor/Boulder)
4728
4770
0.89%
RFA
Hunting (Rifle)
11242
10150
-9.71%
Fishing (Fly)
6071
5478
-9.77%
Fishing (Freshwater/Other)
43100
38860
-9.84%
Skateboarding
10130
6808
-32.79%

*all data from OIA’s 2011Outdoor Recreation Participation Topline Report
No pattern is evident, at least by my definition of risk focused activities. Even as activity ‘groups’, there is variation. Both whitewater and sea kayaking participation is way up (as is recreational kayaking) supporting a group trend, but climbing sees a rise in mountaineering and a fall in sport/gym climbing. In fact, sport/gym climbing at 0.89% has substantially shrunk in participation when compared to population growth (5% over the same period).
This leads me to guess that presence of risk is not a determining factor in recreational activity choice. There is no trend towards or away from risk focused activities (nor even towards ‘thrill seeking’ activities for that matter). Other social cues are playing a greater role attracting new participants to growth activities (triathlon, whitewater and sea kayaking) and away from others (skateboarding, fishing, hunting).
The Outdoor Industry Association’s full document can be found here: