How many?

I need to know... How many people are reading my blog? If you know a way I can find out how post a comment telling me. NOTICE: I need to find out EXACTLY how many people are reading my blog and it has to be FREE. Before you tell me your idea. Write either Exact, or ? then a hyphen. Exact means It WILL work and tell me the exact amount. And ? means you don't know. And I WILL write a post telling you whose idea I choose. If it DOESN'T work I will delet your idea and write a post saying that too. So tell me those ideas!