Hi all!!!!!!

I need some help on this.

How could I convince someone about the importance of SEO? I think you'd all say that this is common sense. But consider that this person doesn't have any common knowledge about Internet or search engines. He just needs to see some reports about the issue. Like, (i.e. in Google) how many people make how many searchs in a day? What's the traffic provided to the first page results and last page results by search engines? And things like that
Do you know any reports of this kind?

Thanks.