Which is Greater - Offline Sales or Online Sales?

I'm conducting a survey over at Book Marketing Buzz over whether you sell more books online or offline. The reasoning behind this is because I believe it will help other authors learn just where those sales are. Granted, it takes both...but...if you had to add it up, which method has been selling your book more than the other if you had to choose? Leave a comment please at www.bookmarketingbuzz.wordpress.com.

Thank you!