Well, our friends at Searchmetrics have spent an enormous amount of time and resources looking closely at the 30 top search results for 10,000 keywords - resulting in an in-depth look at 300,000 website URLs. Their results are shown below in a very nifty infographic.
If you're "in the biz" you'll understand all of this. If you're simply a local business owner looking for answers, we'll need to talk. This stuff will make your head explode.