Looking for Some Internet business statisics.

[JustinSampson]

Hey,
I'm wondering if anyone could point me too a website with numbers such as:

Percentange of North Americans with access to the internet. <FOUND>
Average Increase in sales for a B&M company due to an internet brochure (specifically tourist type companies such as restaurants and gift shops if possible)
Return on web site investment (I can figure this one out if I could findout how many web site visits lead to real world visits)

So does anyone have or know where I can find this information?

Thanks,
Justin Sampson