its not depend on the no. of clicks but depends on the rate of click, some days ago a guy got $26 with a single click.
Thats very low.Better do some research on your niche or analyze what sort of and from where the traffic to your website is coming. 368 clicks to $100 is my score but it keeps on changing.
There isn't much I can do. I have a nice looking site, decent ad placement and decent traffic. I am not in it for money, although I'd like it to earn a bundle.