All Traffic Sources. To get a better idea of the visitors that you're getting from Google Books, we suggest using the All Traffic Sources report. Select Traffic Sources and then click All Traffic. If you type [ books.google ] (without the square brackets) into the search field, you'll see the visitors that have been directed to your site from Google Books. This report tells you how many pages of your site these visitors look at per visit. Referrals. The Referrals report allows you to look deeper into the traffic that you're getting from Google Books. You'll also find this report under Traffic Sources. The Referrals report tells you which individual pages on Google Books have generated the most traffic for your site. Again, type [ books.google ] into the search field to restrict the report to Google Books referrals. Then open up the full range of data by clicking on the books.google row. You'll see the statistics broken out into a page-by-page view. Map Overlay. Curious to know where in the world your visitors are from? With this feature, which you can access by selecting Demographics and then clicking Location, we'll show you the geographical locations of your visitors superimposed on a map of the world.
Please use google analytics to find out as it gives a very comprehensive report about where the traffic is coming from.It tells about the number of visitors per day also and other similar statistics too.
I don't think there's a global stat, but for your own website, you should create an account on Google analytics !
I am agree with kinnethharring and suwandichen13. You can use Google analytic to view traffic from google.