Get plugin version from within plugin

Can my plugin get its version number?

The version number is specified in the plugin header comment and I’d like to send it along with a call to a web service so that the service knows how to return the right value based on the plugin version.

Is there some way for a plugin to know its version number? I don’t want to have to hard-code that version number in the header comment as well as elsewhere in the code.

Thanks!
Ken