As seen in numerous early episodes of The X-Files

Probably about 20 hours.

All of the information regarding these cards is identical to the Mulder cards. For more information, go there.

Update:

With my new found DVD capture capabilities, I have rounded up a couple REALLY nice shots of the shirt dangler for Scully. I think they show that my version is pretty darn close. The signature is a little different in these screen used versions, but oh well. Also notice that the holder for the dangler has a straight cut across the top where you slip in the ID. This is different from earlier versions.