Has anyone statistics for the number of users completing a registration for a service?

I have a client and their website has a registration form the user needs to complete before they can use a service. The registration has 3 steps.

The percent of users completing this process once they complete the first step is 26%.

My question: has anyone any data for typical completion rates for registration once the process has been started?

So % of users starting the process, not % users of all that website's traffic