I have worked countless full arrest codes in the field... countless. Some go a lot better than others, and some are even successful. Most codes are do not end well for the patient whose heart has stopped beating or the drive to breathe has stopped. I can't imagine having stats of the codes we work pushed in our face everyday. There are sooooo many variables that we don't control which would make the whole "measuring" endeavor meaningless to anyone that really cared. From the weight of the patient to the cleanliness of the house are all variables that may or may not matter. Good luck controlling for all that!