every day is not same like yesterday, sometime they improve, some time low, but its depends on your content and audience.
I have to say I didn't feel the financial crisis at all. Quite the contrary. It's like nothing ever happened. And as a total gross earnings, it's even more paradoxal, never had better earnings than since last automn.
how u know this is us based clicks ... first and yes the income increase by the value of ur sites ....