How much weight would a 195 pound women 5'8 women loose on atkins in 4 months?

I am curious...like if any of you have done it and loose that much or witnessed someone who has. I want to loose about 67 pounds. I have already lost a few and it is the second day. I know you can loose alot in the beginning, but in the 3rd and 4th month do you think asking for 5 pounds ever two weeks is asking for too much?