What’s the 12 in Westvleteren 12 mean?

Have you ever wondered what those numbers after the appellation mean? Rochfort 8, Westvleteren 12, what is that all about? Well Mr. Stan Hieronymus breaks it down for us over on his Amazon Blog.
Hit the jump to get the skinny on all those numbers.

http://www.amazon.com/gp/blog/post/PLNK137TVQB6LQ5SK