I know signs but I sign SEE, Most people I've seen in the Deaf Community in my hometown signs ASL only without voice, that's because they're older folks, But I'm not sure about the younger folks because they're only involved with sports in the Deaf Community. I haven't seen them hanging or social with the older folks at the Deaf get-together events.
I'm not certain about the percent and numeric of people that knows only ASL, so I cannot comment that.
