Is there any estimate of the number of successful bank robberies in OT and IT in the period prior to 1900?

I'm having a discussion with a person who claims there were only about a dozen such stickups in the West between 1865 and 1900 (excluding Texas and Missouri). I have some doubts about his numbers.

Best,

Mark Boardman

At another posting on the board entitled "Banks in the I. T." you'll find a brief discussion of bank robbery in the Indian Territory. Oklahoma Territory is a whole different discussion as the early settlers of O. T. brought with them the tradition of the bank. But, I just don't recall ever seeing a summery statement regading numbers of, or numbers of successful, bank robberies before 1900.