@Wyldanimal 's method using a post preview is a useful fallback if you happen to know it (and if your member name is such that it works). However, it is not one that someone new to the forums would think of. It has always seemed strange to me that clicking on you own avatar nect to the "Answer This Topic" text box that I am currently typing into does not bring up this graph whereas clicking on the same avatar anywhere else in the forums will do so.
Also, I feel that this information should be available outside the forums - in particular as a tab on the member's profile page. It would also make sense as an option on the "My Collection" page or even on the "Girls Store" page where a it could be made use of to answer questions like "for what models do I almost have complete collections" or "for what models do I have no cards" the answers to either of which may then lead to extra sales.