Where can I insert Google Analytics Code?

I haven't been able to find the place where I must insert the Google Analytics Code. Can you help me?
Thans a lot.

you can put before end of body element in layout file like default.php (please remember that if you have more page skeletons you have to put it in all of it (in example in iphone.php etc. ))

Thanks. I've done it.

Thisplugin works fine.

Cheers