I've heard similar stats before so they would be roughly accurate in most countries.
I would say however that a lot of it comes down to how a business is run. I've worked with a lot of managers over the years who were bad at their jobs and would have a problem if they were in total control of a business.
I think that the right people can make a success of most businesses if they have the right skills.
Fair play to you for being able to keep multiple businesses going over the years. It takes a lot of time and effort.