It depends on exactly how you're contacting them. Electronic contact with personal email addresses are more likely to get a response than generic "info" address

It depends on exactly how you're contacting them. Electronic contact with personal email addresses are more likely to get a response than generic "info" addresses, let alone "contact us" pages. That said, a 10% rate is generally considered successful. I know that's not encouraging, but I'd say that's the ballpark for success based on my experience.