Boats

Of the bazillions of  boats on this planet, I wonder what percentage of them spend all their time out of the water sitting unused? Why are so many boats on stands in people's yards? In our local boat yards I see some boats sitting year after year unmoved. Did the owner run out of money or dreams or both?  Or, did a non-boating spouse (male or female) say, "it's me or your boat?"  Just wondering.