Cell Phone Use, Brain Cancer

Cell phone use, brain cancer...these are two words you don't really want to hear in the same sentence.

Here's my problem with this topic (see quote at end from Mercola.com, the popular health website).  On the one hand, it seems sensible enough that cell phone use could be causing a rise in brain tumors/cancer.  You get surgeons who are "reporting more cases of brain tumors/cancer than before", cell phone use is on the rise, peer-reviewed journals and all sorts of really credible sounding stuff.

However, there's one piece of information that doesn't seem to match up and I think it's an important one. 

If cell phones have been going up and up in use since, let's say 1992 or so (when I purchased my first cell phone-pictured above), shouldn't the rate of cancer be climbing as well, even if it's on a 10 year delay?  

Well, according to the Cancer Institute, it's dropping!