Here’s a list that my dad brought home from work. It’s from the Industrial Safety and Hygiene manual, chapter 3, section 9, Electrical Safety.
10 Amps to 4 Amps- Severe Burns, Not fatal unless vital organs burned. (I thouht it seemed odd that this is not fatal unless the organs burn)
4 Amps to 250 mA- Heart stops during shock. May restart if current is removed before death.
250 mA to 75 mA- Heart Fibrillation in 1-2 seconds. Usually Fatal.
75 mA to 30 mA- Breathing Stops, often fatal.
30 mA to 10 mA- Cannot let go, current may increase to fatal level.
10 mA to 3 mA- Painful Sensation
3 mA to 1 mA- Mild Sensation
1 mA to 500 uA (500 is the U.L. Limit for consumer products)- Imperceivalbe
500 uA to 100 uA (100 uA is the U.L. limit for hospital equipment not connected directly to the body)
So according to this chart the lowest fatal level is 10 mA, and 30 mA to 250 mA are the highest danger levels. Unfortunatly I just have a copy of the chart and not the text that goes with it so I don't know any of the details or exceptions to the information.