Passholder Mountain

I have some questions.

• What percentage of a mountain's revenue comes from passholders vs other sources? 

• What kinds of mountains get a high percentage of revenue from passholders? What kinds of mountains get a smaller percentage?
  

•  If one mountain gets 50% of revenue or skier visits from passholders how will management differ from a mountain that gets 90% of revenue from single ticket purchases?

• Does it affect midweek lift operation?  Season length?  What else?

I'd love to see a list of North American mountains ranked by percentage of passholder revenue.

I can't totally imagine the implications - and would like to hear what you think.