Japanese language learning statistics

[Ken Pro]

Hi all,
Would anyone happen to know a good source of information on trends in Japanese language learning? I'm working on a project and would like to know the numerical trends in Japanese language learning (for non-Japanese people, of course) over the last 10-15 years. How many people are studying it, what their reasons might be, etc.

I've googled around and am not even sure what organization would be good for research. I can ask a librarian but thought I'd check here as well.

Thanks in advance!

[Rakan]

Maybe these pages can help a little:

http://en.wikipedia.org/wiki/Japanese_language#Study_by_non-native_speakers

http://en.wikipedia.org/wiki/Japanese_Language_Proficiency_Test#Results

if you don't know them already...