I've been pumping since 2003. I have 3 basals rates (0.7 from midnight to 6 am, 0.5 from 6 am to 2 pm, and 0.6 from 2 pm to midnight). My total daily dosage ranges from 19 - 25 units (roughly) depending on what I'm eating. My insulin to carb ratio is 1:20 and one unit of insulin brings me down 72 points (4 mmol).
Cora